A Rare Collision Tumor Composed of Follicular Lymphoma and Adenocarcinoma in the Ampulla of Vater: A Case Report
Figure 7
Representative histologic images of adenocarcinoma of the ampulla of Vater. ((a)–(d)) Follicles of follicular lymphoma are partially invaded by adenocarcinoma (a). Adenocarcinoma shows various patterns, including tubular (b), cribriform, and trabecular structure and nests (c), which invade the pancreas (d).
