Composite tumor (ordinary adenocarcinoma, typical carcinoid, and goblet cell adenocarcinoid) of the gallbladder: a variety of composite tumor.

This case may represent the first reported of a composite tumor with three neoplastic components in the literature. The tumor was composed of discrete areas of an ordinary adenocarcinoma, a typical carcinoid tumor, and a goblet cell adenocarcinoid. The unique case in the gallbladder is reported and the histogenesis of this rare tumor is discussed with a brief review of the literature.