label: Ampulla of Vater Undifferentiated Carcinoma with Osteoclast-Like Giant Cells
label_lc: ampulla of vater undifferentiated carcinoma with osteoclast-like giant cells
description: "A rare variant of undifferentiated carcinoma that arises from the ampulla of Vater. It is characterized by the presence of non-neoplastic, histiocytic, osteoclast-like multinucleated giant cells."