An **Ampullary Biopsy** is a specialized diagnostic procedure performed to evaluate abnormalities in the ampulla of Vater—the crucial junction where the bile and pancreatic ducts empty into the small intestine. Utilizing Endoscopic Retrograde Cholangiopancreatography (ERCP) or standard endoscopy, a gastroenterologist visualizes the area and extracts small tissue samples.

This precise diagnostic test is critical for differentiating between benign conditions, such as inflammatory tissue or adenomas, and malignant tumors like ampullary carcinoma. By providing definitive histopathological analysis, an ampullary biopsy guides clinicians in formulating accurate, timely treatment plans and ensuring targeted patient care.