A Case of a Collision Tumor in the Ampulla of Vater with an Adenocarcinoma and a Large Cell Neuroendocrine Carcinoma / 대한소화기내시경학회지

ABSTRACT

Most tumors affecting Vater's ampulla are adenocarcinomas, but a neuroendocrine carcinoma in the ampulla of Vater is extremely rare. The coexistence of these two tumors has been reported in only a few cases. Here, we report a rare case of a collision tumor of the ampulla of Vater with an adenocarcinoma and a large cell neuroendocrine carcinoma.