Carcinoid of the ampulla of Vater: Morphologic features and clinical implications

Figure 1 The characteristic “double duct sign” on abdominal CT is indicative of obstruction at the level of the ampulla.

Figure 2 ERCP showing a markedly dilated CBD with an abrupt “shoulder” in the region of the ampulla, suggestive of a periampullary mass.

Figure 3 EUS identifying a 23 mm x 27 mm well circumscribed, round, hypoechoic mass in the region of the ampulla, which is distinct from the duodenal wall.