Undifferentiated carcinoma with osteoclast-like giant cells of the ampullary region: Short term survival after pancreaticoduodenectomy.

Introduction Undifferentiated carcinomas with osteoclast-like giant cells (UC-OGCs) of the ampullary region are very rare, with only a few cases reported to date. The clinicopathological features, treatment options, and prognosis of UC-OGCs are unclear. This report describes a patient with UC-OGCs of the ampullary region.