Figure 4
From: A case of biliary cystic tumor with repeated hemobilia
Macroscopic and histopathological findings from the resected specimens. (a) The cut surface of the resected specimen showed a multilocular cystic lesion with many papillary nodules projecting from the lining wall, as well as transparent mucinous fluid. (b) The tumor was histologically composed of a well-differentiated adenocarcinoma with papillary structures. The cyst wall was lined with thick hyalinized connective tissue, and stromal invasion of the tumor was observed (hematoxylin and eosin stain, ×100).