Fig. 1
From: Mixed neuroendocrine–non-neuroendocrine neoplasm of the ampulla of Vater: a case report
Preoperative examination. a, b Enhanced computed tomography image showing an enhancing tumor in the ampullary region protruding into the second part of the duodenum (35 mm × 51 mm) (circle) and an enlarged lymph node adjacent to the peripancreatic lesion (arrowhead). c Duodenoscopy image showing an ulcerated lesion in the swollen ampulla of Vater. d Endoscopic retrograde cholangiography image showing a mass in the distal bile duct arising from the papilla of Vater