Vet Path0132415418 (1995) Biliary Cystadenoma of Cats

Abstract. Published surveys of feline neoplasia have not specifically included biliary cystadenoma, and there is only one case report in the literature. This report is a compilation of 13 feline cases and provides a description of clinical, pathologic, immunohistochemical, and ultrastructural aspects of biliary cystadenoma as well as a discussion of comparative pathology of biliary cystadenoma in human beings and speculative histogenesis. Key words: Biliary cystadenoma; cats; liver. Biliary cystadenoma is a rare neoplasm of humans6 and animals1 ' that arises in the liver and less often in the extra-hepatic bile ducts. The neoplasm is characterized by focal or multicentric cystic proliferation of biliary epithelium in-volving one or more hepatic lobes. Surveys of feline neo-plasms do not include this unusual n e ~ p l a s r n. ~. ~ ~. ' ~. ~ ~ In this report, we describe clinical, pathologic, immunohistochem-ical, and ultrastructural aspects of biliary cystadenoma as seen in 13 domestic cats and provide comparisons with the same entity in human beings