Posterior Reversible Encephalopathy Syndrome

Suspect PRES in acute or subacute headache, seizures, visual loss or other visual disturbance, altered mental status, nausea, or focal weakness, sensory loss, or speech disturbance occurring with acute blood-pressure change, pre-eclampsia/eclampsia, renal dysfunction, autoimmune disease, sepsis, or exposure to cytotoxic or immunosuppressive therapy. Symptoms may evolve during the acute phase and may be isolated rather than forming the classic syndrome. BMJ+1BMJPosterior reversible encephalopathy syndrome (PRES)PubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Prioritize airway protection and critical-care monitoring for impaired consciousness or recurrent seizures; obtain frequent blood-pressure measurements and a focused medication review at presentation. A recorded blood pressure above 180/110 to 120 mm Hg, or persistently above treatment targets, has been used to define uncontrolled hypertension in a PRES case series, but PRES also occurs in nonhypertensive endothelial-injury states. Nature+2NaturePosterior reversible encephalopathy syndrome in Colombia a case series | Scientific ReportsBMJPosterior reversible encephalopathy syndrome (PRES)PubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Do not let the syndrome name imply a benign course. PRES may be associated with petechial hemorrhage on MRI, substantial residual neurologic injury, and death; persistent deficits or residual radiologic lesions have been reported in up to 40% to 44% of patients. BMJ+1BMJPosterior reversible encephalopathy syndrome (PRES)PubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Obtain urgent brain MRI when PRES is suspected. The diagnostic construct combines compatible clinical features and risk factors with MRI evidence of edema, usually involving posterior subcortical regions; T2/FLAIR hyperintensity reflects edema. MRI may also show petechial hemorrhage. BMJBMJPosterior reversible encephalopathy syndrome (PRES)

Interpret MRI in relation to the acute syndrome rather than requiring strictly posterior lesions. The radiologic spectrum is variable, and atypical patterns can delay recognition; diffusion-weighted imaging and apparent diffusion coefficient sequences help characterize lesions when infarction is a competing diagnosis. Wiley+1WileyDiagnosis and treatment of occipital brain lesions in childrenPubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Use the tempo and associated features to pursue key alternatives in parallel. Thunderclap headache or a vasoconstrictive syndrome should raise concern for reversible cerebral vasoconstriction syndrome, which may coexist with or complicate PRES; focal ischemic syndromes require evaluation for cerebral infarction. The Lancet+1The LancetReversible cerebral vasoconstriction syndromeWolters KluwerPosterior reversible encephalopathy syndrome (PRES) in a... Mitochondrial disease is an additional consideration in selected possible cases with an atypical presentation. The LancetThe LancetThe diagnosis of posterior reversible encephalopathy ...

Treat the identified precipitant immediately. Core management consists of correcting the underlying cause and treating associated complications, particularly seizures. In hypertensive presentations, use monitored blood-pressure reduction rather than leaving severe hypertension untreated; in a reported management approach, the therapeutic mean arterial pressure goal was 105 to 125 mm Hg. BMJ+1BMJPosterior reversible encephalopathy syndrome (PRES)Wolters Kluwerposterior reversible encephalopathy syndrome: diverse ...

For medication-associated PRES, urgently reconcile the exposure timeline and coordinate with oncology, transplant, rheumatology, or nephrology to reassess the suspected antineoplastic or immunosuppressive agent. Calcineurin inhibitors, cyclophosphamide, and platinum-based agents are among exposures reported in PRES contexts, while autoimmune disease itself can be a concomitant driver. JAMA+2JAMAReversible Posterior Leukoencephalopathy Syndrome in a ...NaturePosterior reversible encephalopathy syndrome in Colombia a case series | Scientific ReportsPubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

For pregnancy-associated PRES, identify and manage pre-eclampsia or eclampsia as the causal emergency. Pre-eclampsia requires hypertension arising after 20 weeks' gestation plus proteinuria, maternal organ dysfunction, or uteroplacental dysfunction; seizure without another neurologic explanation in this setting defines eclampsia. Nature+1NaturePre-eclampsia | Nature Reviews Disease PrimersNaturePosterior reversible encephalopathy syndrome in Colombia a case series | Scientific Reports Neurologic involvement can occur postpartum, so recent delivery does not lower concern. acpjournals+2acpjournalsA Case Report | Annals of Internal MedicineacpjournalsCLINICAL CASESWileyPostpartum Posterior Reversible Encephalopathy Syndrome ( ...

Treat renal failure, sepsis, and active autoimmune disease as potentially coexisting contributors rather than mutually exclusive alternatives. In a clinical series, patients frequently had more than one etiologic category, and chronic kidney disease and autoimmune disease were common comorbid conditions. NatureNaturePosterior reversible encephalopathy syndrome in Colombia a case series | Scientific Reports

Follow consciousness, seizure recurrence, blood pressure, visual symptoms, and focal deficits during the acute phase because PRES symptoms may evolve. MRI evidence of edema supports the diagnosis, but hemorrhagic foci and atypical lesion patterns should increase concern for complicated disease. BMJ+1BMJPosterior reversible encephalopathy syndrome (PRES)PubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Plan follow-up around the precipitant that caused the event: sustained blood-pressure control after hypertensive PRES, renal and volume management after renal-associated PRES, obstetric follow-up after pre-eclampsia/eclampsia, and a documented strategy for future cytotoxic or immunosuppressive therapy after treatment-associated PRES. These are necessary because the syndrome reflects ongoing endothelial and autoregulatory vulnerability rather than a uniformly self-limited event. BMJ+2BMJPosterior reversible encephalopathy syndrome (PRES)NaturePre-eclampsia | Nature Reviews Disease PrimersPubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management

Counsel the treating teams that neurologic recovery is common but not guaranteed. Reported mortality ranges from 10% to 19%, and persistent neurologic deficits or residual radiologic lesions have been reported in up to 40% to 44% of patients; recovery assessment should therefore include functional neurologic status rather than symptom resolution alone. PubMedPubMedPosterior reversible encephalopathy syndrome (PRES): A narrative review of pathophysiology, clinical insights, and advances in management