Pancreaticoduodenectomy for an Ampullary Region Carcinoma Occurred in Annular Pancreas Coexistent with Replaced Common Hepatic Artery

Figure 4

Microscopic findings. Tumor-forming ulcer at the papilla region, propagating with cord-like and alveolar structures. It consisted of poorly differentiated adenocarcinoma with the formation of a partially glandular structure.