Cardiology
Astra Clinical Library
Evidence, made usable.
Clear clinical guides built from primary literature, major guidelines, and the decisions clinicians face in practice.
190 guides
Read guide
Pulmonary and Critical Care Medicine
Acute Respiratory Distress Syndrome
ARDS requires rapid confirmation of acute noncardiogenic pulmonary edema, identification of the precipitating insult, and prompt lung-protective support. Management priorities are low-tidal-volume ventilation, pressure limitation, selective prone positioning, conservative fluid balance after shock control, and timely referral for extracorporeal support when hypoxemia persists.Nephrology
Acute Kidney Injury
Acute kidney injury requires immediate staging, cause-directed evaluation, and prevention of hyperkalemia, acidosis, volume complications, and drug toxicity. This review prioritizes KDIGO-based diagnosis, practical initial testing, hemodynamic and medication decisions, escalation, kidney replacement therapy, and post-AKI follow-up.Emergency Medicine
Hypertensive Emergency
Hypertensive emergency requires immediate recognition of acute target-organ injury, but the supplied sources do not provide condition-specific diagnostic thresholds, treatment targets, or antihypertensive dosing. Management should therefore follow current local and specialty guidance rather than unsupported protocolization.Pulmonary and Critical Care Medicine
Respiratory Failure
Acute respiratory failure requires parallel stabilization and etiologic diagnosis. Distinguish hypoxemic from hypercapnic physiology, identify airway or ventilatory-support failure early, select oxygen, high-flow, noninvasive, or invasive support by mechanism and trajectory, and reassess continuously for treatment failure.Cardiology
ST-Segment Elevation Myocardial Infarction
ST-segment elevation myocardial infarction requires immediate ECG-based activation, reperfusion-centered care, and early recognition of shock, failed fibrinolysis, mechanical complications, and nonatherothrombotic mimics that alter acute management.Gastroenterology
Acute Pancreatitis
Acute pancreatitis requires rapid confirmation, severity assessment, etiologic evaluation, and targeted supportive care. The supplied search results do not include pancreatitis-specific diagnostic criteria, fluid protocols, nutrition guidance, biliary intervention recommendations, or antimicrobial indications; management details therefore require verification against current specialty guidance.Critical Care Medicine
Septic Shock
Septic shock requires parallel source-directed therapy and physiology-guided resuscitation. Identify infection-associated organ dysfunction, obtain cultures without delaying antimicrobials, assess fluid responsiveness dynamically, initiate norepinephrine promptly for persistent hypotension, and repeatedly reassess perfusion, source control, and evolving organ failure.Orthopaedic Trauma
Open Fracture Management
Open fractures require immediate contamination control, antibiotic prophylaxis, neurovascular assessment, stable skeletal management, and timely definitive soft-tissue coverage. This review prioritizes actions that reduce fracture-related infection, avoid missed vascular or compartment injury, and align debridement, fixation, and reconstruction with injury severity.Vascular Neurology
Ischemic Stroke
Acute ischemic stroke requires parallel stabilization, hemorrhage-excluding brain imaging, rapid reperfusion eligibility assessment, and vascular imaging for large-vessel occlusion. Intravenous thrombolysis and mechanical thrombectomy are time-sensitive complementary therapies; avoid diagnostic or transfer delays that defer either treatment.Obstetrics and Maternal-Fetal Medicine
Eclampsia
Eclampsia is a seizure emergency in pregnancy or postpartum. Stabilize airway and circulation, terminate convulsions with magnesium sulfate, urgently control sustained severe hypertension, evaluate competing neurologic diagnoses, and plan delivery after maternal stabilization rather than during uncontrolled seizure activity.Addiction Medicine
Alcohol Withdrawal Syndrome
Alcohol withdrawal syndrome requires early risk stratification, serial clinical assessment, benzodiazepine-based treatment for clinically significant withdrawal, supportive correction of nutritional and metabolic complications, and deliberate transition to treatment for alcohol use disorder.Pulmonology
Chronic Obstructive Pulmonary Disease
COPD requires confirmation with post-bronchodilator spirometry, then treatment guided by symptoms, exacerbation history, inhaler delivery, eosinophils, and comorbidity rather than FEV₁ alone. Long-acting bronchodilation is foundational; escalation should target the dominant residual problem while minimizing avoidable inhaled corticosteroid and treatment toxicity.Emergency Medicine and General Surgery
Acute Abdomen
Acute abdomen requires parallel resuscitation and diagnosis: identify patients with peritonitis, shock, obstruction, ischemia, or hemorrhage who need urgent surgical or procedural management, while using focused laboratory testing and imaging to distinguish operative disease from conditions appropriate for monitored conservative care.Cardiology
Heart Failure
Heart failure requires phenotype-specific confirmation, rapid identification of reversible precipitants, early disease-modifying therapy for reduced ejection fraction, and surveillance for congestion, arrhythmia, renal dysfunction, and progression to advanced therapies. Management must align treatment intensity with hemodynamics, comorbidity, and patient goals.Cardiology
Myocardial Infarction
Myocardial infarction requires immediate ECG-based triage, assay-specific serial troponin interpretation, differentiation of ischemic infarction from myocardial injury, and rapid selection of reperfusion or invasive management. Post-event care should consolidate antithrombotic therapy, ventricular assessment, rehabilitation, and secondary prevention.Emergency Medicine and Endocrinology
Adult Diabetic Ketoacidosis
Adult diabetic ketoacidosis requires immediate recognition of insulin deficiency, volume depletion, electrolyte derangement, and its precipitant. This review focuses on rapid diagnostic confirmation, diabetes-type reassessment, safe insulin-dependent care, and prevention of recurrent hyperglycemic crises using currently supplied evidence.Endocrinology and Emergency Medicine
Hyperosmolar Hyperglycemic Syndrome
Hyperosmolar hyperglycemic syndrome is a life-threatening hyperglycemic emergency requiring prompt recognition, volume resuscitation, electrolyte-directed insulin therapy, and evaluation for precipitating illness. The supplied search results do not contain HHS-specific diagnostic thresholds or treatment protocols; current emergency guidance should be consulted.Gastroenterology and General Surgery
Acute Cholecystitis
Acute cholecystitis requires prompt distinction from alternative biliary and nonbiliary causes of right upper-quadrant pain, confirmation with imaging, assessment for sepsis or ductal complications, and timely source control. The supplied results do not contain disease-specific diagnostic or management guidance.Hematology-Oncology
Tumor Lysis Syndrome
Tumor lysis syndrome requires prospective risk stratification before cytoreduction, intensive early metabolic surveillance, rapid urate reduction when indicated, and a low threshold for renal replacement therapy when electrolyte derangements, oliguria, or volume overload become refractory.Critical Care Medicine
Abdominal Compartment Syndrome
Abdominal compartment syndrome is new organ dysfunction caused by sustained intra-abdominal hypertension. Diagnosis requires standardized bladder-pressure measurement in at-risk critically ill patients; management combines rapid pressure-reducing measures, source-directed drainage when feasible, and timely decompressive laparotomy for refractory organ dysfunction.Nephrology
Chronic Kidney Disease
Chronic kidney disease requires persistent abnormalities in filtration or kidney-damage markers, risk stratification with eGFR and albuminuria, and early use of cardiorenal therapies while avoiding medication-related harm. Management intensity should reflect progression risk, cardiovascular risk, frailty, and patient goals.Neurology and Neurocritical Care
Status Epilepticus
Status epilepticus requires immediate seizure termination, cardiorespiratory support, etiologic evaluation, and EEG-guided escalation. Adequate early benzodiazepine dosing and prompt loading with a second-line antiseizure medication reduce avoidable progression to refractory status, while persistent impaired consciousness mandates assessment for nonconvulsive seizures.Obstetrics and Gynecology
Ectopic Pregnancy
Ectopic pregnancy requires rapid exclusion of rupture, localization with transvaginal ultrasonography and serial quantitative hCG, and treatment matched to stability, pregnancy characteristics, follow-up reliability, and fertility priorities. Methotrexate is effective only in carefully selected, closely monitored patients; surgery is definitive for rupture or high-risk disease.Obstetrics and Gynecology
Postpartum Hemorrhage
Postpartum hemorrhage requires objective blood-loss measurement, immediate treatment linked to predefined triggers, rapid evaluation of tone, trauma, tissue, and thrombin, and early escalation when first-response measures fail. Current evidence supports a coordinated bundle rather than sequential, delayed intervention.Allergy and Immunology
Anaphylaxis
Recognize anaphylaxis clinically, administer intramuscular epinephrine without delay, support airway and circulation, and escalate promptly when symptoms persist. Observation, discharge preparedness, and allergy evaluation reduce risk from recurrence, biphasic reactions, and avoidable re-exposure.Pediatrics and Psychiatry
Suicide Risk in Children and Adolescents
Assess youth suicide risk through direct, developmentally appropriate inquiry, collateral information, and evaluation of prior self-harm plus current ideation, plan, intent, and preparations. Match immediate safety measures, disposition, lethal-means counseling, safety planning, and evidence-based follow-up to dynamic clinical risk rather than a score alone.Cardiology and cardiovascular surgery
Aortic Dissection
Aortic dissection requires rapid anatomic diagnosis, immediate anti-impulse therapy, and disposition determined by ascending-aortic involvement, rupture, malperfusion, and persistent symptoms. Computed tomographic angiography is first-line in most stable patients; type A disease requires emergency surgical evaluation, whereas uncomplicated type B disease begins with medical therapy.Endocrinology and emergency medicine
Adrenal Crisis
Adrenal crisis is a time-critical endocrine emergency causing hypotension, volume depletion, hypoglycemia, and electrolyte disturbance. Obtain cortisol and ACTH if this does not delay care, then give parenteral hydrocortisone, isotonic saline, glucose when indicated, and treat the precipitant.Medical Oncology
Breast Cancer
Breast cancer management requires subtype-, stage-, and patient-specific integration of surgery, systemic therapy, radiation, germline testing, and survivorship care. This review prioritizes decisions that alter treatment sequencing, adjuvant endocrine duration, recurrence surveillance, and management of male breast cancer.Neurology, Neurosurgery, Neuro-oncology
Conus and Cauda Equina Tumors
Conus and cauda equina tumors require urgent localization when sphincter dysfunction or progressive deficits occur, contrast-enhanced MRI for compartment-based differential diagnosis, and early multidisciplinary planning to balance neural preservation, tissue diagnosis, resection extent, stability, and oncologic prognosis.Infectious Diseases
HIV-2 Infection
HIV-2 requires deliberate recognition, type-specific viral-load access, and regimens active against HIV-2. Although progression and transmission are generally slower than with HIV-1, untreated infection can cause AIDS; avoid NNRTIs and coordinate care with an experienced HIV-2 clinician.Infectious Diseases
Toxic Shock Syndrome
Toxic shock syndrome is a rapidly progressive toxin-mediated shock syndrome from Staphylococcus aureus or group A Streptococcus. Treat suspected disease before surveillance criteria are complete: resuscitate, obtain cultures, remove or debride the source, and provide pathogen-directed antitoxin therapy.Neurology and Neurocritical Care
Subarachnoid Hemorrhage
Spontaneous subarachnoid hemorrhage requires immediate noncontrast CT, escalation to lumbar puncture when suspicion persists after negative imaging, identification and early exclusion of an aneurysm, specialized neurovascular care, and prevention of delayed cerebral ischemia with nimodipine and vigilant vasospasm surveillance. [7]Obstetrics and Gynecology
Placental Abruption
Placental abruption is a clinical diagnosis requiring immediate assessment of maternal hemodynamics, coagulation, and fetal status. Vaginal blood loss may substantially underestimate severity; management prioritizes resuscitation, early recognition of consumptive coagulopathy, and delivery based on maternal and fetal condition.Obstetrics and Gynecology
Preeclampsia
The supplied results do not contain preeclampsia-specific diagnostic criteria, prevention, treatment, delivery timing, medication dosing, or postpartum guidance. This topic requires consultation of current obstetric guidelines before point-of-care use.Cardiology
Heart Failure With Preserved Ejection Fraction
HFpEF requires objective evidence of heart failure beyond a preserved ejection fraction. Diagnose systematically, exclude cardiac and noncardiac mimics, use stress or invasive hemodynamics when uncertainty persists, decongest judiciously, initiate SGLT2 inhibition, and phenotype-directed therapy for obesity, CKD, atrial fibrillation, and hypertension.Addiction Medicine
Opioid Use Disorder
Diagnose opioid use disorder clinically with DSM-5 criteria, address overdose or psychiatric emergencies first, and promptly offer evidence-based medication treatment. Buprenorphine, methadone, and extended-release naltrexone have distinct initiation requirements, settings, and monitoring needs; withdrawal management alone is not treatment.Medical Toxicology
Acetaminophen Toxicity
Acetaminophen toxicity requires rapid exposure clarification, timed serum concentration testing, early antidotal therapy when risk cannot be excluded, and escalation for evolving hepatic failure. This review emphasizes actionable diagnostic limits and the evidence gaps within the supplied sources.Endocrinology
Diabetes Mellitus Screening
Screen adults and selected youth for dysglycemia using validated plasma glucose or A1C testing, confirm abnormal results when hyperglycemia is not unequivocal, and recognize settings—including HIV and pediatric risk—in which test selection and interpretation require modification.Endocrinology and critical care
Thyroid Storm
Thyroid storm is a clinical diagnosis of decompensated thyrotoxicosis with acute organ dysfunction. Immediate ICU-level multimodal therapy, treatment of the precipitant, and cautious cardiovascular management are required; thyroid hormone concentrations do not distinguish storm from uncomplicated thyrotoxicosis.[8]Gastroenterology
Upper Gastrointestinal Bleeding
Acute upper gastrointestinal bleeding requires immediate hemodynamic assessment, restrictive but context-sensitive transfusion, pre-endoscopic risk stratification, and endoscopy within 24 hours after resuscitation. Management diverges early for suspected variceal hemorrhage and must balance hemostasis against thrombotic risk from interrupted antithrombotic therapy.Pulmonology
Lung Cancer Screening
Annual low-dose CT reduces lung cancer mortality in appropriately selected high-risk adults, but benefit depends on excluding symptomatic patients, assessing fitness for diagnostic workup and curative treatment, integrating tobacco treatment, and ensuring reliable longitudinal nodule follow-up.Infectious Diseases
Meningitis
Suspected acute meningitis requires parallel stabilization, prompt blood cultures and lumbar puncture when safe, and immediate empiric therapy without diagnostic delay. Cerebrospinal fluid interpretation, targeted molecular testing, host factors, and neuroimaging indications determine etiologic treatment, public-health actions, and surveillance for delayed neurologic sequelae.Infectious Diseases
Acute Pyelonephritis
Acute pyelonephritis requires prompt distinction from uncomplicated lower urinary infection and obstructed upper-tract infection. The supplied results do not contain a pyelonephritis-specific guideline, antimicrobial regimen, imaging pathway, or disposition criteria; treatment decisions require current dedicated guidance and local susceptibility data.Nephrology
Hyperkalemia
The supplied sources do not contain clinical evidence on hyperkalemia diagnosis, electrocardiographic risk stratification, acute treatment, potassium-lowering therapies, dialysis, or longitudinal management; therefore, a safe point-of-care management review cannot be produced from this evidence set.Neurology and Oncology
Spinal Cord Compression
Spinal cord compression requires immediate localization, etiologic triage, and definitive decompression or oncologic treatment before neurologic injury becomes irreversible. In suspected malignant compression, urgent whole-spine contrast MRI, prompt corticosteroid use when neurologic involvement is present, and early spine-oncology coordination preserve ambulation and guide surgery versus radiotherapy.Pulmonology and Medical Oncology
Lung Cancer
Lung cancer management depends on rapid histologic confirmation, accurate stage assignment, and—particularly in non-small cell lung cancer—tumor biomarker characterization before selecting surgery, radiation, systemic therapy, or symptom-directed care. Multidisciplinary coordination is central to preserving curative options and matching treatment intensity to patient goals.Medical Oncology
Small Cell Lung Cancer
Small cell lung cancer requires prompt distinction between limited- and extensive-stage disease, early multidisciplinary planning, and vigilance for rapid clinical decline. Current therapy remains stage-dependent chemoradiation or chemoimmunotherapy, but relapse is common and emerging therapies are reshaping later-line management.Neurology and Neurocritical Care
Intracranial Hemorrhage
Intracranial hemorrhage requires immediate localization, cause-directed imaging, reversal of anticoagulation when present, and early neurosurgical or neurocritical care triage. Outcomes depend on hemorrhage compartment, hematoma expansion, ventricular involvement, hydrocephalus, blood pressure, and timely control of secondary injury.Cardiology
Atrial Fibrillation
A practical framework for confirming atrial fibrillation, defining acute stability, completing the initial evaluation, preventing thromboembolism, selecting rate or rhythm control, and identifying patients who benefit from catheter ablation or focused heart-failure management.Medical Toxicology and Emergency Medicine
Carbon Monoxide Poisoning
Carbon monoxide poisoning is a time-sensitive clinical diagnosis requiring immediate oxygen therapy, co-oximetry confirmation, cardiopulmonary assessment, and selective hyperbaric consultation. Carboxyhemoglobin supports exposure but does not grade injury reliably after oxygen or delayed presentation; neurologic and cardiac findings drive disposition.Medical Toxicology and Emergency Medicine
Carbon Monoxide Toxicity
Carbon monoxide toxicity requires exposure-based diagnosis, prompt oxygenation, and assessment for occult neurologic and cardiac injury. Carboxyhemoglobin alone does not define severity or disposition; serial clinical assessment and targeted cardiac evaluation identify patients at risk for acute complications and delayed sequelae.Endocrinology
Obesity and Type 2 Diabetes
Excess adiposity is a central, modifiable driver of insulin resistance and type 2 diabetes progression. Management should integrate weight-directed treatment with complication-focused glucose-lowering therapy, prioritizing cardiometabolic outcomes, safety, treatment burden, and durable access.Pediatric endocrinology and emergency medicine
Pediatric Diabetic Ketoacidosis
Pediatric diabetic ketoacidosis requires rapid confirmation of hyperglycemia, ketonemia, and acidosis; protocolized isotonic fluid resuscitation, potassium replacement, and delayed low-dose intravenous insulin; and intensive neurologic surveillance for cerebral edema while treating the precipitant and preventing recurrence.[21]Endocrinology
Type 1 Diabetes
Type 1 diabetes requires lifelong physiologic insulin replacement, early continuous glucose monitoring, and structured prevention of hypoglycemia and ketoacidosis. Accurate classification—including adult-onset autoimmune disease—guides urgent insulin initiation, technology selection, sick-day planning, and referral for disease-modifying or beta-cell replacement options.Endocrinology
Type 2 Diabetes
Type 2 diabetes management should pair individualized glycemic targets with early selection of therapies that reduce cardiovascular, heart failure, kidney, weight, and hypoglycemia risk—not simply A1C. Reassess medication effectiveness, safety, affordability, and treatment burden every 3–6 months.General Surgery
Appendicitis
The supplied search results contain no appendicitis-specific diagnostic, imaging, antibiotic, operative, or nonoperative-management evidence. Consequently, this review identifies the evidence gap rather than extrapolating from unrelated infectious disease guidelines.Gynecology and Gynecologic Oncology
Cervical Cancer
Cervical cancer care hinges on prevention through HPV-based screening, prompt risk-based evaluation of abnormal results, stage-appropriate local therapy, and biomarker-directed systemic treatment for persistent, recurrent, or metastatic disease.Hematology
Disseminated Intravascular Coagulation
Disseminated intravascular coagulation is an acquired, dynamic syndrome of systemic coagulation activation, consumptive factor depletion, and dysregulated fibrinolysis. Diagnose it from the clinical trigger plus serial global hemostasis testing; treatment priorities are rapid source control, organ support, and phenotype-directed hemostatic therapy.Neonatology
Neonatal Sepsis
Neonatal sepsis requires immediate culture-directed evaluation and empiric treatment when illness is plausible, while structured early-onset risk assessment, serial examination, and timely culture review prevent avoidable antibiotic exposure in uninfected infants.Obstetrics and Gynecology
Ovarian Torsion
Ovarian torsion is a time-sensitive surgical diagnosis. Neither normal Doppler flow nor nondiagnostic ultrasonography excludes torsion; when clinical concern persists, expedite gynecologic evaluation and diagnostic laparoscopy, with detorsion and ovarian preservation favored whenever technically feasible.Psychiatry
Major Depressive Disorder
Major depressive disorder requires clinical confirmation after screening, assessment of suicide and bipolar risk, and individualized psychotherapy and medication selection. Use measurement-based follow-up to detect inadequate response, intolerance, or worsening risk early, and escalate care for severe, psychotic, suicidal, or treatment-resistant illness.Emergency Medicine
Foreign Body Airway Obstruction
Foreign body airway obstruction requires immediate distinction between effective coughing, complete obstruction, and retained distal aspiration. Early airway clearance is time-critical; persistent symptoms or a credible aspiration history warrant imaging and specialist-directed endoscopic evaluation even when radiographs are normal.Preventive Medicine
Breast Cancer Screening
For asymptomatic average-risk patients, mammography remains the core screening test. The principal U.S. decision is interval selection—biennial screening from age 40 versus annual strategies—after confirming risk status, avoiding unproven supplemental imaging, and individualizing cessation by health status and willingness to undergo evaluation and treatment.Cardiology
Chest Pain
Evaluate acute chest pain with immediate ECG, high-sensitivity troponin, and structured risk pathways while actively excluding ACS, aortic syndromes, pulmonary embolism, and other lethal alternatives. Stable symptoms require contemporary pretest assessment and selective anatomic or functional testing rather than routine testing.Cardiology and Critical Care Medicine
Cardiogenic Shock
Cardiogenic shock requires immediate recognition of tissue hypoperfusion, rapid identification of a reversible cause, phenotype-directed vasoactive support, serial reassessment, and early escalation or transfer when pharmacologic support cannot preserve end-organ perfusion.Critical Care Medicine
Distributive Shock
Distributive shock is acute circulatory failure from pathologic vasodilation and maldistributed flow. Rapidly identify the precipitant, assess for concurrent hypovolemic, cardiogenic, or obstructive physiology, treat the cause, restore perfusion with individualized fluid resuscitation, and initiate vasopressors without delaying definitive therapy.[14][15]Emergency Medicine
Heat Stroke
Heat stroke is a time-critical hyperthermic emergency defined by central nervous system dysfunction with markedly elevated core temperature. Immediate active cooling—particularly for exertional collapse—takes priority over transport, while clinicians evaluate and manage evolving renal, hepatic, muscle, and coagulation injury.Emergency Medicine and Orthopedic Surgery
Acute Compartment Syndrome
Acute compartment syndrome is a time-critical clinical diagnosis in which escalating intracompartmental pressure compromises muscle and nerve perfusion. Serial examination, urgent surgical involvement, selective pressure measurement in unreliable examinations, and prompt complete fasciotomy are the decisions most likely to preserve limb function.Pulmonary and Critical Care Medicine
Acute Pulmonary Embolism
Acute pulmonary embolism requires probability-guided testing, rapid assessment for cardiopulmonary failure, immediate anticoagulation when indicated, and selective escalation to reperfusion therapy. Contemporary multisociety guidance emphasizes integrated clinical, hemodynamic, respiratory, biomarker, and right-ventricular assessment to guide disposition and treatment.Psychiatry
Suicide Risk Assessment
Suicide assessment is a repeated, collaborative clinical process that identifies current ideation, intent, planning, access to lethal means, prior behavior, drivers, and protective factors to determine immediate safety actions, treatment needs, and follow-up rather than to assign a static risk category.Critical Care Medicine
Bacterial Sepsis
Bacterial sepsis requires immediate recognition of infection-associated organ dysfunction, parallel microbiologic evaluation and resuscitation, prompt empiric antibiotics when illness is critical, source-directed control, and repeated reassessment to narrow therapy and identify noninfectious mimics.Emergency Medicine, Trauma Surgery, Critical Care
Hemorrhagic Shock
Hemorrhagic shock demands immediate recognition, mechanical hemorrhage control, rapid blood-product delivery, and parallel definitive operative or endovascular management. This review emphasizes time-sensitive actions, reassessment, trauma-specific diagnostic limitations, and important evidence gaps in resuscitation targets and adjunctive pharmacotherapy.Critical Care Medicine
Neurogenic Shock
Neurogenic shock is acute distributive shock after high spinal cord injury, driven by loss of sympathetic tone and often accompanied by bradycardia. Immediate priorities are trauma resuscitation, exclusion of hemorrhage and other shock states, invasive hemodynamic monitoring, and blood-pressure augmentation while definitive spinal evaluation proceeds.Critical Care Medicine
Shock
Shock requires simultaneous resuscitation and etiologic diagnosis. Recognize tissue hypoperfusion before sustained hypotension, establish monitoring and access, use focused bedside testing to identify the hemodynamic phenotype, and rapidly deliver source- or mechanism-directed treatment while reassessing perfusion and treatment response.Hepatology
Primary Biliary Cholangitis
Primary biliary cholangitis is usually diagnosed serologically in the setting of cholestatic liver tests. Management centers on prompt ursodeoxycholic acid, biochemical risk reassessment, escalation for inadequate response or intolerance, symptom-directed care, fibrosis assessment, and surveillance for complications.Hepatology
Primary Sclerosing Cholangitis
Primary sclerosing cholangitis requires cholangiographic confirmation, exclusion of secondary causes, systematic evaluation for inflammatory bowel disease, and surveillance for hepatobiliary and colorectal malignancy. No drug has established disease-modifying benefit; management centers on complications, selected biliary intervention, and timely transplant referral.Hematology-Oncology
Acute Myeloid Leukemia
Acute myeloid leukemia requires rapid confirmation, cytogenetic and molecular risk assessment, treatment-intensity selection, and early transplant planning. Management is increasingly genotype-directed, but supportive care, response assessment, measurable residual disease interpretation, and clinical-trial access remain central to outcomes.Hematology-Oncology
Acute Promyelocytic Leukemia
Acute promyelocytic leukemia is a hematologic emergency in which immediate presumptive treatment and aggressive coagulopathy support should precede definitive molecular confirmation, because early hemorrhagic death is preventable. Subsequent therapy is risk-adapted to presenting leukocyte count and requires specialized monitoring.Infectious Diseases
Septic Arthritis
A hot, swollen, acutely painful joint requires urgent evaluation for septic arthritis regardless of fever, peripheral blood tests, or initial microbiology. Prompt synovial-fluid sampling, blood cultures, antimicrobial therapy, and early orthopedic source-control assessment are central to preventing irreversible joint injury.Orthopedic Surgery
Hip Fracture
Hip fracture requires rapid confirmation, perioperative medical optimization without avoidable delay, fracture-pattern–appropriate fixation or arthroplasty, early rehabilitation, and secondary fracture prevention. In older adults, care is defined as much by delirium, thrombotic, functional, and mortality risk as by the operation.Neurology
Guillain-Barré Syndrome
Guillain-Barré syndrome is an acute immune-mediated polyradiculoneuropathy requiring prompt recognition of progressive weakness, areflexia, cranial or autonomic involvement, and respiratory risk. Diagnosis is clinical, supported by cerebrospinal fluid and electrodiagnostic testing; IVIG or plasma exchange plus intensive supportive care are established treatments.Pediatrics
Child Abuse and Neglect
Child abuse and neglect require prompt recognition, meticulous medical assessment, protection-focused communication, and reporting under applicable law. Clinicians should distinguish medical mimics from concerning injury patterns while avoiding delay in safeguarding, multidisciplinary evaluation, and referral for ongoing physical and mental health needs.Neonatology
Neonatal Respiratory Distress Syndrome
Neonatal respiratory distress syndrome is surfactant-deficiency respiratory failure in premature infants. Early recognition, noninvasive respiratory support, selective surfactant delivery, and avoidance of injurious ventilation are central decisions while infection, transient tachypnea, and air-leak disorders remain in the differential.Gastroenterology and Hepatology
Cholangitis
Acute cholangitis is biliary infection with potential for rapid sepsis and organ failure. Management hinges on immediate resuscitation and antibiotics, severity assessment, and timely biliary drainage when obstruction persists or disease is severe.Gastroenterology and Colorectal Surgery
Large Bowel Obstruction
Large bowel obstruction requires rapid distinction between mechanical obstruction, volvulus, and acute colonic pseudo-obstruction, with immediate resuscitation, CT-based anatomic definition, and urgent surgical or endoscopic involvement when ischemia, perforation, or complete obstruction is suspected.Emergency Medicine and General Surgery
Small Bowel Obstruction
Small bowel obstruction requires rapid imaging-based confirmation, assessment for ischemia or strangulation, resuscitation, and early operative triage. Stable adhesive obstruction can often undergo monitored nonoperative management, whereas peritonitis, ischemia, or clinical deterioration mandates urgent surgical evaluation.Neurology
Acute Stroke
Acute stroke care hinges on immediate hemorrhage exclusion, rapid identification of disabling ischemia and large-vessel occlusion, timely reperfusion when eligible, physiologic stabilization, and early stroke-unit management. Contemporary guidelines emphasize systems that shorten treatment delays and extend thrombectomy to selected late-window patients.Endocrinology
Adrenal Insufficiency
Adrenal insufficiency requires rapid recognition of crisis, physiologic glucocorticoid replacement, etiologic localization with ACTH, and assay-aware cortisol interpretation. Distinguish primary disease from central and glucocorticoid-induced suppression because mineralocorticoid replacement, testing strategy, and long-term management differ.Hepatology
Hepatic Cirrhosis
Cirrhosis may remain clinically silent despite normal routine liver tests. Recognize portal-hypertension signals, stage fibrosis noninvasively when appropriate, identify decompensation promptly, treat the underlying etiology, and refer early for complication-directed and transplant-centered care.Urology and Preventive Medicine
Prostate Cancer Screening
PSA-based screening offers a small, delayed reduction in prostate cancer mortality for selected men but increases false-positive testing, biopsy, overdiagnosis, and treatment-related harm. Use shared decision-making, life expectancy, baseline risk, and a planned diagnostic pathway rather than PSA testing alone.Urology and Medical Oncology
Prostate Cancer
Prostate cancer care requires risk-adapted use of PSA testing, MRI and biopsy, judicious selection of surveillance or definitive local therapy, and stage-specific systemic treatment anchored by androgen deprivation therapy.Hematology
Sickle Cell Anemia
Sickle cell anemia requires longitudinal, multidisciplinary care focused on preventing stroke and infection, modifying disease severity, safely managing acute complications, and evaluating curative cellular therapies for appropriately selected patients.Hematology
Sickle Cell Crisis
Sickle cell crisis requires rapid recognition of vaso-occlusive pain while actively excluding acute chest syndrome, infection, stroke, and other time-sensitive complications. Care is strongest when acute analgesia, complication-directed evaluation, and longitudinal disease-modifying or curative options are coordinated with a sickle cell specialist.Gastroenterology
Chronic Pancreatitis
Chronic pancreatitis requires structural confirmation, etiologic assessment, and longitudinal surveillance for pain, ductal complications, exocrine insufficiency, diabetes, malnutrition, bone disease, and malignancy. Imaging should establish disease and actionable obstruction; treatment should target the dominant complication rather than pain alone.General Surgery
Chronic Cholecystitis
Chronic cholecystitis usually reflects recurrent or persistent cystic-duct obstruction, producing fibrosis, impaired gallbladder emptying, and recurrent biliary symptoms. Ultrasound establishes cholelithiasis; evaluate for ductal obstruction when liver tests are abnormal. Elective laparoscopic cholecystectomy is definitive treatment for symptomatic disease.Nephrology
Hyponatremia
A practical approach to confirm hypotonic hyponatremia, classify impaired water excretion using urine studies and volume assessment, treat neurologic emergencies with hypertonic saline, and prevent osmotic demyelination through controlled correction and urine-output surveillance.Endocrinology
Hypoglycemia
Hypoglycemia requires immediate reversal, identification of medication- and illness-related drivers, and prevention of recurrence. Management differs for an alert patient, a patient requiring assistance, and prolonged events from insulin secretagogues or depleted hepatic glycogen.Infectious Disease
HIV and AIDS
HIV care hinges on prompt laboratory diagnosis, immediate linkage to antiretroviral therapy, durable viral suppression, and prevention services for patients and partners. This review focuses on diagnostic interpretation, acute infection, transmission prevention, PrEP, and clinically meaningful immune monitoring.Neurology and Infectious Diseases
Herpes Simplex Encephalitis
Herpes simplex encephalitis requires immediate recognition and IV acyclovir while cerebrospinal fluid HSV PCR establishes the diagnosis. Renal-adjusted dosing, hydration, and surveillance for virologic versus autoimmune relapse are the highest-yield management decisions supported by the available evidence.Neonatology and Pediatric Infectious Diseases
Neonatal Meningitis
Neonatal meningitis requires prompt cerebrospinal fluid evaluation and hospital-based empiric antimicrobial therapy because clinical findings are nonspecific, culture sensitivity falls after antibiotics, and delayed recognition risks death and neurodevelopmental disability.Infectious Diseases
Arboviral Encephalitis
Arboviral encephalitis requires early syndromic stabilization, empiric acyclovir while treatable causes are evaluated, and epidemiologically targeted serology coordinated with public health laboratories. Interpretation is complicated by flavivirus antibody cross-reactivity and impaired humoral responses in B-cell-depleted patients.Obstetrics and Gynecology
Pelvic Inflammatory Disease
Pelvic inflammatory disease is a clinical diagnosis requiring prompt empiric broad-spectrum treatment when pelvic organ tenderness accompanies lower genital tract inflammation in a patient at STI risk. Early management, reassessment, complication detection, and partner care are central to preventing reproductive sequelae.Obstetrics and Gynecology
Placenta Previa
Placenta previa requires transvaginal confirmation, assessment for vasa previa and placenta accreta spectrum, and individualized planning that balances recurrent hemorrhage against prematurity. Complete or partial os coverage precludes vaginal delivery; low-lying placentas require internal-os distance–based counseling and delivery planning.Pediatrics
Acute Otitis Media
Acute otitis media requires confirmation of middle-ear effusion with compatible tympanic-membrane inflammation, not symptoms or erythema alone. Management hinges on analgesia, selective antibiotic use, reassessment of nonresponse, and recognition of uncommon suppurative or intracranial complications.Emergency Medicine
Epiglottitis
Epiglottitis is an airway-threatening supraglottic infection requiring immediate risk stratification, avoidance of destabilizing examination, coordinated airway planning, and antimicrobial treatment after airway priorities are addressed. Children and adults require different diagnostic approaches, but deterioration can be abrupt in either group.Ophthalmology
Retinal Detachment
Retinal detachment requires rapid classification, assessment of macular status, and urgent vitreoretinal referral. Management differs for rhegmatogenous, tractional, and exudative disease; procedure selection depends on break anatomy, lens status, proliferative vitreoretinopathy, and surgeon judgment.Pulmonary and critical care medicine
Pneumothorax
Pneumothorax management hinges on immediate recognition of physiologic compromise, accurate imaging in stable patients, and selecting observation, aspiration, drainage, ambulatory care, or definitive surgery according to cause, symptoms, recurrence risk, and ability to ensure follow-up.Emergency Medicine
Tension Pneumothorax
Tension pneumothorax is a time-critical clinical diagnosis of respiratory and/or circulatory compromise from pleural air under pressure. Decompress immediately when instability or severe respiratory compromise is present; do not delay for imaging, then provide definitive pleural drainage.Vascular Medicine
Deep Venous Thrombosis
Deep venous thrombosis requires structured pretest-probability assessment, selective D-dimer use, and timely compression ultrasonography. Management centers on therapeutic anticoagulation, determination of provoking factors and recurrence risk, and selective use of advanced interventions only when anticoagulation is contraindicated or clinical threat is exceptional.Hospital Medicine
Delirium
Delirium is an acute, fluctuating disturbance in attention and cognition that requires prompt bedside recognition, confirmation with structured assessment, and a search for reversible precipitants. Multicomponent prevention and careful attention to baseline cognition, medication exposure, hydration, mobility, sleep, and sensory impairment are central to care.Obstetrics and Gynecology
Preterm Labor
Preterm labor requires separating contractions unlikely to lead to imminent birth from true cervical change, then using time-limited interventions to complete antenatal corticosteroids, provide neuroprotection, and arrange delivery at an appropriate neonatal center.Gastroenterology and General Surgery
Adult Intussusception
Adult intussusception is increasingly detected on cross-sectional imaging, but management hinges on distinguishing transient enteric telescoping from obstruction or a lead-point lesion, particularly colonic malignancy requiring oncologic resection.Pediatrics
Kawasaki Disease
Kawasaki disease requires prompt clinical recognition and coronary surveillance because no confirmatory test exists, incomplete presentations remain at risk for coronary aneurysm, and treatment should not be deferred for a negative early echocardiogram or rigid completion of fever-duration criteria.Neonatology
Neonatal Hypoglycemia
Neonatal hypoglycemia requires risk-based screening, time-sensitive operational thresholds, prompt feeding or dextrose therapy, and escalation for symptomatic, severe, recurrent, or persistent low glucose values while recognizing that universally validated neuroprotective thresholds remain unavailable.Psychiatry
Bipolar Disorder
Bipolar disorder requires longitudinal diagnostic assessment and phase-specific treatment. Prioritize recognition of past mania or hypomania in depressed patients, manage acute episodes with mood stabilizers or antipsychotics, and sustain relapse prevention through individualized maintenance medication, psychosocial care, and safety monitoring.Pulmonology
Asthma
Asthma care depends on confirming variable expiratory airflow limitation, assessing current control and exacerbation risk, and selecting the lowest effective anti-inflammatory regimen while repeatedly addressing inhaler technique, adherence, triggers, and diagnostic alternatives.Pulmonology and Transplant Medicine
Bronchiolitis Obliterans
Bronchiolitis obliterans is an irreversible small-airway fibrotic syndrome most often encountered after lung or allogeneic hematopoietic stem-cell transplantation. Early spirometric decline, infection exclusion, and transplant-team evaluation are central because established airflow obstruction is difficult to reverse.Emergency Medicine
Hypothermia
Hypothermia requires core-temperature confirmation, recognition of temperature-dependent cardiovascular and neurologic depression, gentle handling, prevention of further heat loss, and escalation of rewarming support according to severity and circulatory status.Gastroenterology
Crohn Disease
Crohn disease requires objective confirmation, phenotype-based risk assessment, steroid-sparing treatment, and longitudinal monitoring beyond symptoms. Ileocolonoscopy with biopsy establishes diagnosis and extent; biomarkers and cross-sectional imaging help detect ongoing inflammation, complications, and discordance between symptoms and disease activity.Gastroenterology
Peptic Ulcer Disease
Peptic ulcer disease requires prompt distinction of uncomplicated ulcer from hemorrhage, obstruction, or malignancy. Management centers on removing NSAID exposure when feasible, identifying and eradicating Helicobacter pylori, acid suppression, and timely endoscopic intervention for bleeding or concerning gastric ulcers.Hematology and Oncology
Chronic Lymphocytic Leukemia
CLL requires confirmation of persistent clonal B-cell lymphocytosis, risk assessment before therapy, and treatment only for active disease. Modern care prioritizes BTK- and BCL2-directed strategies, while surveillance remains appropriate for most asymptomatic early-stage patients.Hematology-Oncology
Chronic Myelogenous Leukemia
Chronic myelogenous leukemia requires molecularly confirmed BCR::ABL1 disease classification, early and serial standardized molecular monitoring, individualized tyrosine kinase inhibitor selection, and prompt evaluation of inadequate response, intolerance, adherence, interactions, and kinase-domain mutations to prevent progression.Internal Medicine
Long COVID
Long COVID is a heterogeneous postinfectious syndrome diagnosed after excluding alternative disease. Evaluation should be phenotype-directed, prioritize cardiopulmonary and neurologic danger signals, avoid indiscriminate testing, and use individualized rehabilitation that does not provoke postexertional symptom worsening.Emergency Medicine and Neurology
Acute Headache
Acute headache evaluation hinges on recognizing secondary causes before treating presumed primary headache. Sudden onset and abnormal neurologic examination are especially predictive red flags; persistent concern for subarachnoid hemorrhage after nondiagnostic CT warrants further evaluation, commonly lumbar puncture.Nephrology
Nephritic Syndrome
Nephritic syndrome requires rapid separation of infection-related immune-complex disease from ANCA-associated, anti-GBM, complement-mediated, and monoclonal processes, with urgent biopsy and serologies when kidney function declines or pulmonary hemorrhage is suspected.Nephrology
Nephrotic Syndrome
Nephrotic syndrome requires rapid identification of thrombosis, acute kidney injury, infection, and an etiologic branch that determines biopsy, secondary-disease evaluation, supportive measures, and disease-specific immunosuppression.Neurology
Central Post-Stroke Pain Syndrome
Central post-stroke pain is a diagnosis of lesion-concordant central neuropathic pain after stroke. Confirm the sensory phenotype and lesion, exclude common peripheral and musculoskeletal post-stroke pain generators, then individualize medication trials and consider neuromodulation for refractory disability.Ophthalmology
Pseudoexfoliation Syndrome and Glaucoma
Pseudoexfoliation syndrome requires structured surveillance for asymmetric, pressure-labile glaucoma and deliberate cataract planning because zonular weakness, poor dilation, endothelial vulnerability, and postoperative pressure elevation materially alter treatment selection and surgical risk.Rheumatology
Giant Cell Arteritis
Treat suspected giant cell arteritis immediately when ischemic manifestations are present, while rapidly confirming cranial and large-vessel disease with vascular imaging and/or temporal artery biopsy.Cardiology and Infectious Diseases
Infective Endocarditis
Manage suspected infective endocarditis by obtaining diagnostic blood cultures before antibiotics, defining valve or device involvement with staged imaging, identifying heart failure or uncontrolled infection requiring urgent surgery, and tailoring antimicrobial therapy to microbiology with documented culture clearance.Cardiology and Infectious Diseases
Prosthetic Valve Endocarditis
Prosthetic valve endocarditis requires early culture-directed evaluation, transesophageal echocardiography, and selective CT or FDG-PET/CT to detect occult paravalvular infection and define urgency for valve surgery.Cardiology and Infectious Diseases
Infective Endocarditis Prophylaxis
Use a two-step decision: identify patients at highest risk of adverse endocarditis outcomes, then determine whether the planned dental procedure manipulates gingiva, periapical tissue, or oral mucosa. Give one preprocedure antibiotic dose only when both conditions are met.Cardiology and Clinical Cardiac Electrophysiology
Wolff-Parkinson-White Syndrome
Manage Wolff-Parkinson-White syndrome by recognizing pre-excited atrial fibrillation as an electrical emergency, avoiding AV-nodal blockers, and referring symptomatic or high-risk patients for electrophysiologic assessment and accessory-pathway ablation.Pulmonary and Critical Care Medicine
Dyspnea
Dyspnea requires rapid separation of airway, pulmonary vascular, parenchymal, cardiac, metabolic, and neuromuscular causes. Initial physiologic severity determines disposition; targeted bedside imaging, ECG, biomarkers, pulmonary testing, and exercise evaluation then identify the mechanism driving symptoms and direct treatment.Cardiology and Emergency Medicine
Syncope
Evaluate syncope by first identifying unstable cardiac, structural, pulmonary, hemorrhagic, or neurologic mimics; then use history, orthostatic vital signs, examination, and 12-lead ECG to direct selective testing, disposition, rhythm correlation, and cause-specific treatment.Obstetrics and Gynecology
Gestational Diabetes
Gestational diabetes requires timely glucose-based diagnosis, nutrition and activity treatment, escalation to pharmacotherapy when glycemic targets are not met, and postpartum surveillance for type 2 diabetes risk. Treatment reduces important perinatal complications, while medication selection requires individualized maternal and fetal tradeoffs.Infectious Disease
Latent Tuberculosis
Target testing to patients at increased risk, exclude active tuberculosis before treatment, and preferentially use short-course rifamycin-based regimens after resolving clinically consequential drug interactions and monitoring requirements.Pediatric Infectious Disease
Tuberculosis in Children
A practical approach to pediatric tuberculosis centers on separating exposure, infection, and disease; obtaining microbiologic confirmation whenever feasible; identifying CNS and disseminated disease urgently; and matching treatment to disease severity, susceptibility, age, and the likely source-case resistance pattern.Nephrology
Infection-Related Glomerulonephritis
Infection-related glomerulonephritis requires prompt recognition of a nephritic urine sediment, identification and eradication of active infection, volume and blood-pressure control, and kidney biopsy when rapidly progressive injury or competing immune glomerular disease would change treatment.Neurology
Alzheimer Disease
Evaluate cognitive impairment clinically, establish or exclude Alzheimer pathology with validated amyloid and tau biomarkers when results will alter management, treat symptoms selectively, and refer eligible early-stage patients for anti-amyloid treatment assessment with MRI-based ARIA surveillance.Pediatrics
Febrile Seizure
Classify the event promptly, treat ongoing convulsions as status at 5 minutes, and direct testing toward meningitis or another cause of fever. A neurologically normal child with a simple febrile seizure generally needs fever-focused evaluation rather than EEG, imaging, or antiseizure prophylaxis.Neurology
Parkinson Disease
Parkinson disease is a clinical diagnosis requiring bradykinesia plus rest tremor or rigidity. Confirm the parkinsonian syndrome, identify exclusion criteria and atypical red flags, use dopaminergic response as longitudinal diagnostic evidence, and individualize symptomatic therapy while actively screening motor and nonmotor disability.Neurology
Atypical Parkinsonism
Evaluate progressive parkinsonism for early autonomic failure, vertical gaze dysfunction, falls, cortical deficits, cognitive fluctuation, or poor levodopa response to distinguish multiple system atrophy, progressive supranuclear palsy, corticobasal syndrome, and dementia with Lewy bodies from Parkinson disease.Neurology
Stroke Reperfusion Injury
Recognize reperfusion injury after thrombolysis or thrombectomy by separating hemorrhagic transformation, malignant edema, and procedural complications; use serial neurologic examinations and urgent brain imaging to identify deterioration requiring blood pressure reassessment, intensive monitoring, and neurosurgical intervention.Internal Medicine
Acute Sinusitis
Acute rhinosinusitis is usually viral; identify the clinical patterns that increase the likelihood of bacterial disease, reserve imaging for complications or alternative diagnoses, and use watchful waiting or targeted antibiotics with defined reassessment and escalation thresholds.Pediatrics
Croup
Manage croup by recognizing impending upper-airway failure, separating viral disease from epiglottitis, bacterial tracheitis, and foreign body, then using corticosteroids for symptomatic disease and nebulized epinephrine for clinically important obstruction with repeated bedside reassessment.Pediatrics
Infantile Hypertrophic Pyloric Stenosis
In an infant with progressive nonbilious projectile emesis, rapidly distinguish pyloric obstruction from bilious or systemic emergencies, confirm suspected hypertrophic pyloric stenosis with ultrasound when needed, correct dehydration and metabolic alkalosis before anesthesia, then proceed to pyloromyotomy.Psychiatry
Schizophrenia
Manage schizophrenia with measurement-based antipsychotic treatment, early detection of nonresponse and nonadherence, adverse-effect-directed drug selection, and timely clozapine for treatment resistance, persistent suicidality, or aggression. Long-acting formulations can strengthen relapse prevention when oral adherence is unreliable.Rheumatology
Systemic Lupus Erythematosus
Manage SLE by confirming a clinical autoimmune phenotype, rapidly identifying renal, neurologic, hematologic, thrombotic, and cardiopulmonary threats, then using hydroxychloroquine and early steroid-sparing therapy to control activity while limiting glucocorticoid damage.Cardiology
Aortic Stenosis
Aortic stenosis management hinges on confirming hemodynamic severity, resolving low-gradient discordance, and selecting valve replacement modality through anatomy, operative risk, life expectancy, concomitant disease, and transfemoral access.Endocrinology
Hyperthyroidism
Confirm biochemical thyrotoxicosis, rapidly identify thyroid storm, then distinguish hormone overproduction from destructive or exogenous hormone exposure to select thionamides, definitive therapy, or non-antithyroid management.Gastroenterology
Gastroesophageal Reflux Disease
Manage GERD by separating unproven reflux from proven reflux with persistent symptoms, selecting ambulatory testing on or off proton pump inhibitors accordingly, and reserving invasive therapy for objectively documented reflux with an appropriate anatomic and physiologic phenotype.Hematology-Oncology
Burkitt Lymphoma
Burkitt lymphoma requires urgent expert confirmation, staging that specifically interrogates marrow and cerebrospinal fluid, tumor-lysis planning, and prompt rituximab-containing multiagent therapy with central nervous system-directed treatment selected by disease risk and CNS involvement.Hematology-Oncology
Diffuse Large B-Cell Lymphoma
Diffuse large B-cell lymphoma requires prompt tissue-confirmed classification, molecular risk assessment, stage-directed curative-intent therapy, and early referral for cellular therapy when relapse occurs within 12 months or disease is refractory.Hematology-Oncology
Follicular Lymphoma
Manage follicular lymphoma by confirming grade and excluding transformation, staging with FDG PET/CT, reserving therapy for clinically consequential disease, and tailoring relapse treatment to timing, prior exposure, refractoriness, fitness, and planned cellular or T-cell–engaging therapy.Hematology-Oncology
Hairy Cell Leukemia
Confirm classic HCL with integrated morphology, immunophenotyping, and BRAF V600E assessment; treat only clinically consequential disease, then select purine analog, BRAF-directed therapy, or relapse-directed treatment by infection status, fitness, and remission duration.Hematology-Oncology
Hodgkin Lymphoma
Confirm Hodgkin lymphoma on adequately sampled tissue, stage with FDG-PET/CT, and use disease extent, bulk, prognosis, and PET-adapted response to select curative-intent treatment while minimizing late toxicity.Hematology-Oncology
Mantle Cell Lymphoma
Confirm mantle cell lymphoma with tissue-based cyclin D1/CCND1 testing, distinguish its key diagnostic mimics, stage before treatment, and select induction intensity by fitness. Relapse management depends critically on prior BTK inhibitor exposure and eligibility for cellular therapy.Hematology-Oncology
Multiple Myeloma
Multiple myeloma management requires confirmation of a myeloma-defining event, urgent control of organ-threatening complications, risk-informed induction and transplant planning, and sequencing of cellular or T-cell–redirecting therapies at relapse.Hematology-Oncology
Non-Hodgkin Lymphoma
Non-Hodgkin lymphoma requires rapid conversion of a suspected lymphoid malignancy into a specific histologic diagnosis, stage, and tempo category. Management diverges sharply between aggressive entities requiring prompt systemic therapy and indolent entities in which symptom burden and disease distribution determine treatment timing.Infectious Diseases
Cellulitis
Manage presumed cellulitis by first excluding a drainable abscess and necrotizing infection, then matching antibiotics to purulence, systemic severity, and MRSA risk. Most uncomplicated nonpurulent cases require streptococcal coverage, source-control assessment, and reassessment within 48 hours.Infectious Diseases
Osteomyelitis
Osteomyelitis management depends on anatomic syndrome, microbiologic confirmation, source control, and a feasible antimicrobial route. In diabetic foot disease, probe-to-bone, radiography, MRI, and bone biopsy guide diagnosis; selected patients can receive medical therapy or conservative bone resection.Neurology
Myasthenia Gravis
Myasthenia gravis requires rapid separation of respiratory or bulbar deterioration from stable ocular or generalized disease, confirmation with antibody and electrodiagnostic testing, chest imaging for thymoma, and phenotype-directed escalation from pyridostigmine to immunotherapy or rescue treatment.Ophthalmology
Orbital Cellulitis
Orbital cellulitis requires immediate distinction from preseptal infection because pain with eye movement, ophthalmoplegia, proptosis, or visual impairment signals postseptal disease, urgent contrast imaging, hospital-based intravenous therapy, and ophthalmology-ENT coordination to prevent vision-threatening or intracranial extension.Pediatrics
Pediatric Asthma
Confirm variable airflow limitation when feasible, treat exacerbations promptly with bronchodilation and early corticosteroids, and adjust long-term therapy according to current control, exacerbation risk, adherence, inhaler technique, and age-specific treatment options.Anesthesiology
Perioperative Management of Congenital Heart Disease
Noncardiac surgery in patients with congenital heart disease requires lesion- and physiology-specific planning. Determine residual obstruction, shunt direction, ventricular function, pulmonary vascular disease, rhythm risk, and procedural stress before selecting surgical setting, monitoring, anesthesia, and postoperative disposition.Nephrology
Anion Gap Metabolic Acidosis
Use blood gas confirmation, anion-gap classification, potassium, kidney function, and urinary ammonium surrogates to rapidly distinguish life-threatening organic acid accumulation from gastrointestinal bicarbonate loss, renal tubular acidosis, chronic kidney disease, and chloride-related acidosis.Primary Care and Musculoskeletal Medicine
Low Back Pain
A decision-focused approach to low back pain that prioritizes cauda equina syndrome, spinal infection, fracture, malignancy, and progressive neurologic deficit; limits low-value imaging; and selects function-oriented nonpharmacologic, medication, injection, or surgical pathways.Addiction Medicine
Patient Communication in Substance Use Disorders
Use nonjudgmental, person-centered communication to identify treatment goals, address ambivalence, reduce stigma, and connect patients with substance use disorders to evidence-based medications, behavioral treatment, harm reduction, and longitudinal follow-up.Cardiology
Mitral Regurgitation
A decision-focused approach to confirming severity, separating primary from secondary mitral regurgitation, selecting repair versus transcatheter therapy, and identifying patients whose ventricular remodeling or heart failure burden warrants multidisciplinary valve intervention.Endocrinology
Cushing Disease
Confirm persistent endogenous hypercortisolism before localization, then distinguish pituitary ACTH secretion from ectopic ACTH production with pituitary MRI and selective inferior petrosal sinus sampling. Transsphenoidal resection is first-line; recurrent or persistent disease requires individualized multimodal cortisol control.Endocrinology
Cushing Syndrome
Confirm autonomous hypercortisolism before localization, then use ACTH to separate adrenal from pituitary or ectopic disease. Surgical cure is preferred, but urgent cortisol control, source-directed imaging, petrosal sampling, and medical bridging are essential when disease is severe or surgery is not curative.Endocrinology
Hypothyroidism
Use TSH and free T4 to distinguish primary from central hypothyroidism, identify myxedema coma immediately, individualize levothyroxine initiation for cardiovascular risk, and avoid routine treatment of mild persistent subclinical disease in older adults.Endocrinology
Pituitary Hyperplasia in Primary Hypothyroidism
In a patient with pituitary enlargement, markedly elevated TSH with low free thyroxine should redirect management toward primary hypothyroidism. Recognize diffuse thyrotroph hyperplasia, assess mass effect and pituitary axes, replace thyroid hormone, and document regression before considering pituitary surgery.Pulmonary and Critical Care Medicine
Bacterial Pneumonia
Manage suspected bacterial pneumonia by establishing illness severity and site of care, confirming a compatible pulmonary process, obtaining targeted microbiology in severe disease, and rapidly reconsidering alternative diagnoses or complications when empiric therapy fails.Infectious Diseases and Preventive Medicine
COVID-19 Vaccine
Use the current-season COVID-19 vaccine to restore protection against circulating SARS-CoV-2, then prioritize a second dose for adults 65 years or older and people with moderate or severe immunocompromise at 6 months, with individualized additional dosing for immunocompromised patients.Neurology
Absence Seizure
Confirm typical absence seizures with an event-capturing EEG, then classify childhood versus juvenile absence epilepsy and screen for myoclonic or generalized tonic-clonic seizures before selecting ethosuximide, valproate, or lamotrigine.Neurology
Brainstem Stroke
Brainstem stroke requires immediate vascular imaging and reperfusion assessment because minor-appearing cranial nerve, gait, or consciousness findings may represent basilar occlusion, vertebral dissection, or perforator infarction with rapid respiratory, motor, and consciousness deterioration.Neurology
Generalized Tonic-Clonic Seizure
Manage an ongoing convulsion as status epilepticus at 5 minutes while establishing airway protection and reversible causes. After stabilization, distinguish generalized-onset epilepsy from focal-to-bilateral tonic-clonic seizure, acute symptomatic seizure, convulsive syncope, and eclampsia to guide EEG, imaging, recurrence counseling, and antiseizure therapy.Neurology
Lacunar Stroke
Manage suspected lacunar stroke as an acute ischemic stroke while confirming the mechanism with diffusion MRI and vascular-cardioembolic evaluation. Long-term decisions hinge on distinguishing true small-vessel disease from parent-artery, embolic, or incidental infarction and avoiding harmful chronic dual antiplatelet therapy.Neurology
Multiple Sclerosis
Diagnose multiple sclerosis by demonstrating typical dissemination and excluding mimics, treat clinically meaningful relapses promptly, and initiate disease-modifying therapy early while matching efficacy, safety, reproductive plans, and inflammatory activity.Neurology
Seizure
Manage a suspected seizure by identifying ongoing status epilepticus, rapidly separating acute provoked from unprovoked events, obtaining targeted metabolic, infectious, toxicologic, EEG, and neuroimaging data, and using recurrence-risk features to decide whether long-term antiseizure treatment is justified.Neurology
Stroke Mimics
Acute focal deficits require parallel stroke treatment readiness and rapid mimic recognition. Use bedside pattern analysis, glucose testing, CT-based vascular imaging, and selectively MRI or EEG to identify seizure, migraine, metabolic, functional, vestibular, inflammatory, venous, and structural alternatives without delaying reperfusion decisions.Obstetrics and Gynecology
Abnormal Uterine Bleeding
Evaluate abnormal uterine bleeding by first excluding pregnancy and nonuterine bleeding, then stratifying endometrial cancer risk, identifying PALM-COEIN causes, and selecting imaging, sampling, medical therapy, or uterine intervention according to bleeding pattern and reproductive goals.Pediatric Endocrinology
Congenital Hypothyroidism
Manage an abnormal newborn screen as a time-critical thyroid hormone deficiency: confirm with serum testing, begin levothyroxine promptly, monitor free T4 and TSH intensively, and use thyroid imaging to clarify permanence without delaying treatment.Psychiatry and Primary Care
Generalized Anxiety Disorder
Diagnose generalized anxiety disorder clinically after defining severity, functional impairment, comorbidity, substance contributions, and acute safety risk; then match treatment intensity to patient preference, access, and prior response using cognitive behavioral therapy, an SSRI, or an SNRI.Pulmonary and Critical Care Medicine
Aspiration Pneumonia
Manage suspected aspiration pneumonia as community-acquired pneumonia unless resistant-pathogen risk is independently present, while distinguishing infection from aspiration pneumonitis, pulmonary edema, and obstructing or cavitary disease. Prioritize oxygenation, radiographic confirmation, targeted microbiology, swallowing evaluation, and prevention of recurrent aspiration.Pulmonary and Infectious Disease