Two patients undergo pancreaticoduodenectomy for ampullary carcinoma. Histopathology of patient X shows glandular epithelium resembling colonic adenoma with intestinal-type differentiation, while patient Y shows small tubular glands resembling pancreatic ductal carcinoma with pancreatobiliary differentiation. Regarding five-year survival, which statement is correct?
- A Patient X will have significantly better survival than patient Y ✓
- B Patient Y will have significantly better survival than patient X
- C Both patients have identical survival irrespective of subtype
- D Subtype determines operability, not survival
Explanation
Ampullary carcinoma is divided into intestinal and pancreatobiliary histological subtypes with clearly different outcomes. The intestinal subtype behaves more like colonic adenocarcinoma, tends to present earlier with jaundice at smaller size, and carries a substantially better five-year survival, roughly double that of the pancreatobiliary subtype, which behaves like pancreatic ductal adenocarcinoma with early nodal spread. Both subtypes are managed identically by pancreaticoduodenectomy, so subtype influences prognosis rather than operability. This distinction matters for adjuvant planning, since intestinal-type tumors may respond to oxaliplatin-based regimens.
Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.