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Gastrointestinal Oncology

Pancreatic Cancer

Manage pancreatic ductal adenocarcinoma by establishing histology when systemic therapy is planned, defining vascular anatomy and metastatic burden on pancreas-protocol imaging, and selecting surgery-first versus neoadjuvant treatment through multidisciplinary review of resectability and biologic risk.

Clinical question: How should physicians stage, classify resectability, and sequence treatment for pancreatic ductal adenocarcinoma?

Initial Assessment

Stage before committing to surgery or systemic therapy

The initial decision is whether disease is potentially curable by multimodality treatment or metastatic and managed primarily with systemic therapy.

Use high-resolution pancreas-protocol CT angiography as the principal preoperative study for local staging, vascular mapping, resectability assessment, and surgical planning; MRI is an alternative or complementary modality when needed for staging clarification. Review images in a pancreas-focused multidisciplinary conference before assigning resectability or scheduling resection. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer

Establish the diagnosis and stage with cross-sectional imaging plus tissue confirmation when neoadjuvant or palliative systemic therapy is planned. Imaging alone may establish a surgical pathway for a clearly resectable pancreatic mass, but treatment sequencing should be revisited if radiographic findings are equivocal, regional adenopathy is suspicious, or CA 19-9 is elevated. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Use CA 19-9 as a baseline disease-burden and longitudinal monitoring adjunct, not as a screening or independent diagnostic test. A normal result does not exclude pancreatic ductal adenocarcinoma because some tumors do not secrete CA 19-9 in patients with Lewis antigen Le(a−b−). Interpret interval values with imaging-based response assessment rather than using marker change alone to declare progression or response. scienceGenome-wide analyses of cell-free DNA for therapeutic monitoring of patients with pancreatic cancer

Anatomic resectability directs the initial therapeutic sequence. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer
Clinical categoryDefining imaging featuresInitial management implication
ResectableNo metastases and no major vascular involvement. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherUpfront resection is a standard approach, followed by adjuvant chemotherapy; consider neoadjuvant chemotherapy for elevated CA 19-9, suspicious nodes, or equivocal imaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Borderline resectableLimited contact of 180° or less with the celiac axis, superior mesenteric artery, common hepatic artery, or inferior vena cava, or reconstructable portal vein/superior mesenteric vein involvement. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherUse neoadjuvant chemotherapy, with or without radiotherapy, then reassess for surgical resection. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer
Locally advancedUnresectable because of extensive vascular involvement. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherBegin individualized nonsurgical management; radiotherapy may improve local control, and surgery may be considered only in selected patients after downstaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
MetastaticDistant metastatic disease on staging imaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherUse systemic therapy as the central treatment modality; surgery is not the routine initial strategy. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 Study

Potentially Curative Disease

Sequence therapy for anatomically resectable disease

The key choice is surgery-first versus neoadjuvant treatment for patients with technically resectable disease.

For resectable pancreatic ductal adenocarcinoma, surgery-first followed by adjuvant chemotherapy remains a standard pathway. The intent is an R0 resection followed by postoperative systemic treatment; therefore, assess whether the patient can realistically complete multimodality therapy before choosing the sequence. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer

Use neoadjuvant chemotherapy selectively in resectable disease with high-risk biology or uncertain stage, particularly elevated CA 19-9, radiographically suspicious lymphadenopathy, or equivocal imaging findings. This approach may clarify disease trajectory before a major operation, but randomized evidence has not yet conclusively established a survival advantage over surgery-first treatment for all upfront-resectable tumors. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherWolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of Surgery

After resection, use adjuvant combination chemotherapy when tolerable. Combination regimens including modified FOLFIRINOX and gemcitabine-capecitabine have improved disease-free and overall survival compared with gemcitabine in the postoperative setting. Wolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of Surgery

Factors favoring discussion of neoadjuvant treatment despite anatomically resectable imaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
FindingClinical interpretationNext action
Elevated CA 19-9Higher-risk feature in otherwise resectable disease. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherDiscuss neoadjuvant chemotherapy in multidisciplinary review. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Suspicious lymphadenopathyRaises concern for higher systemic relapse risk or understaged disease. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherConsider preoperative systemic therapy rather than automatic surgery-first management. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Equivocal radiographic findingsCreates uncertainty regarding local extent or occult metastatic disease. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherRe-review pancreas-protocol imaging and consider neoadjuvant chemotherapy. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Monitoring after surgery or during perioperative therapy

Monitor with serial clinical assessment, cross-sectional imaging, and CA 19-9 only when the tumor is a known secretor. CT-based RECIST 1.1 assessment remains a standard radiographic framework for response monitoring, while CA 19-9 has biologic limitations and should not replace imaging. scienceGenome-wide analyses of cell-free DNA for therapeutic monitoring of patients with pancreatic cancer

Vascular Involvement

Use induction therapy before attempted resection in borderline-resectable disease

Vascular anatomy determines whether resection should be immediate, deferred after therapy, or not initially pursued.

Treat borderline-resectable pancreatic cancer with neoadjuvant chemotherapy, potentially followed by chemoradiotherapy, before attempting resection. This applies to limited arterial contact of 180° or less and to portal or superior mesenteric venous involvement that is reconstructable. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer

Reassess after neoadjuvant treatment with repeat pancreas-protocol imaging, clinical status, and tumor-marker trajectory when informative. Surgical exploration is appropriate only when the multidisciplinary team judges that an R0 resection is feasible, including vascular reconstruction when required. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Manage locally advanced disease as unresectable at presentation when extensive vascular involvement precludes resection. Systemic therapy is the primary initial modality; radiotherapy may improve local control, while resection is reserved for selected patients with sufficient downstaging and favorable operative anatomy after treatment. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Vascular findings that distinguish borderline-resectable from locally advanced pancreatic cancer. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Imaging patternResectability interpretationTreatment sequence
Tumor contact of 180° or less with celiac axis, superior mesenteric artery, common hepatic artery, or inferior vena cavaBorderline resectable. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherNeoadjuvant chemotherapy with or without radiotherapy, then restaging for possible surgery. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer
Reconstructable portal vein or superior mesenteric vein involvementBorderline resectable. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherNeoadjuvant treatment before possible venous resection and reconstruction. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Extensive vascular involvement preventing resectionLocally advanced and initially unresectable. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherSystemic therapy; consider radiotherapy for local control and surgery only after selected downstaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Systemic Management

Match systemic treatment intensity to stage and functional reserve

Combination cytotoxic therapy is central across disease stages, but its use must account for performance status and treatment toxicity.

For localized disease receiving perioperative treatment, multiagent cytotoxic chemotherapy is integrated with surgery rather than used as an alternative to curative-intent local therapy. Modified FOLFIRINOX is one commonly used combination regimen; full-dose FOLFIRINOX consists of oxaliplatin 85 mg/m², leucovorin 400 mg/m², irinotecan 180 mg/m², and fluorouracil 2,400 mg/m², with or without a fluorouracil bolus. Oxford AcademicFOLFIRINOX as Initial Treatment for Localized Pancreatic ...Wolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of Surgery

For metastatic pancreatic cancer, systemic therapy is the core treatment modality. Treatment selection must account for performance status because chemotherapy toxicity is clinically significant; contemporary trial and guideline frameworks commonly evaluate systemic treatment in patients with ECOG performance status 0-2. ASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 Study

Do not routinely expect benefit from immune-checkpoint therapy in unselected pancreatic ductal adenocarcinoma. Pancreatic cancer is largely resistant to immunotherapy, with reported response rates below 5%; investigational immune, cellular, and molecularly targeted approaches should not displace established stage-directed treatment outside appropriate clinical contexts. Oxford AcademicKRAS-driven immune exclusion in pancreatic ductal ...Wolters KluwerRole of CAR-T cell therapy in pancreatic cancer:...

Practical systemic-treatment considerations by clinical setting. Oxford AcademicFOLFIRINOX as Initial Treatment for Localized Pancreatic ...Wolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of SurgeryOxford AcademicKRAS-driven immune exclusion in pancreatic ductal ...ASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 Study
SettingTreatment objectiveDecision constraint
Resectable or borderline-resectable diseaseIntegrate multiagent chemotherapy with curative-intent resection according to resectability and risk features. Wolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of SurgeryASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherSequence chemotherapy before surgery for borderline-resectable disease; surgery-first remains standard for many resectable tumors. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic Cancer
Locally advanced diseaseControl systemic disease and improve local control; reassess selected patients for conversion to surgery. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherExtensive vascular involvement precludes initial resection. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Metastatic diseaseSystemic disease control and symptom-directed management. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 StudyBalance multidrug-treatment toxicity against ECOG performance status and patient goals. ASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 Study
Unselected PDAC treated with immunotherapyRoutine checkpoint inhibitor monotherapy has limited expected activity. Oxford AcademicKRAS-driven immune exclusion in pancreatic ductal ...Reported response rates are below 5%; prioritize established systemic strategies or appropriate trials. Oxford AcademicKRAS-driven immune exclusion in pancreatic ductal ...

Response assessment

Assess treatment response with serial CT using RECIST 1.1 principles and correlate with symptoms, performance status, and CA 19-9 trends when applicable. CT findings can be misleading during immunotherapy because inflammatory infiltration may resemble progression, although immunotherapy has limited activity in unselected pancreatic ductal adenocarcinoma. scienceGenome-wide analyses of cell-free DNA for therapeutic monitoring of patients with pancreatic cancerOxford AcademicKRAS-driven immune exclusion in pancreatic ductal ...

Care Delivery

Escalate complex anatomy and uncertain staging early

Treatment quality depends on repeated expert reassessment rather than a single imaging interpretation.

Refer patients with borderline-resectable or locally advanced disease to a center with pancreatic surgical, vascular reconstruction, medical oncology, radiation oncology, and dedicated radiology expertise. Focused review of pancreas-protocol CT can change resectability assignment, and multidisciplinary management is central to treatment planning across localized disease states. ASCOExploring Perioperative Therapy in Pancreatic CancerWolters KluwerPancreatic Cancer—Advances in the Last 50 Years : World Journal of Surgery

Reconsider surgery after induction therapy only through iterative multidisciplinary assessment of vascular anatomy, metastatic progression, treatment tolerance, and the prospect of an R0 resection. Approximately 20% of patients undergo surgery overall, underscoring the need to avoid nonbeneficial exploration in persistently unresectable disease. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

Use shared decision-making when choosing surgery-first, neoadjuvant, or nonsurgical treatment, explicitly discussing anatomic resectability, likelihood of completing multimodality therapy, performance status, toxicity burden, and the patient's goals. ESMOESMO Clinical Practice Guideline: Pancreatic CancerASCOTumor Treating Fields With Gemcitabine and Nab-Paclitaxel for Locally Advanced Pancreatic Adenocarcinoma: Randomized, Open-Label, Pivotal Phase III PANOVA-3 Study

Triggers for multidisciplinary reassessment. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic CancerASCOContemporary Multidisciplinary Treatment of Borderline-Resectable and Locally Advanced Pancreatic Adenocarcinoma | American Society of Clinical Oncology Educational Book
TriggerWhy it changes managementRequired next step
Outside or equivocal staging imagingResectability classification depends on high-quality vascular assessment. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherASCOExploring Perioperative Therapy in Pancreatic CancerObtain or review pancreas-protocol CT angiography or MRI with dedicated pancreatic radiology input. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Elevated CA 19-9 or suspicious nodes in resectable diseaseThese are high-risk features that can favor neoadjuvant treatment. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherDiscuss treatment sequencing before surgical scheduling. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together
Completion of neoadjuvant therapyOperability may change with treatment response or progression. ASCOContemporary Multidisciplinary Treatment of Borderline-Resectable and Locally Advanced Pancreatic Adenocarcinoma | American Society of Clinical Oncology Educational BookRepeat staging and review candidacy for resection in multidisciplinary conference. ASCOContemporary Multidisciplinary Treatment of Borderline-Resectable and Locally Advanced Pancreatic Adenocarcinoma | American Society of Clinical Oncology Educational Book
Extensive vascular involvementDefines locally advanced disease and makes initial surgery inappropriate. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work TogetherInitiate nonsurgical therapy and reconsider surgery only after selected downstaging. ASCOMultidisciplinary Management of Resectable and Borderline Resectable Pancreatic Cancer: How We Work Together

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