Multicystic peritoneal tumor in two layer hens

摘要

In chicken, peritoneal cystic lesions have not been clearly categorized. In this study,diffuse peritoneal multiple cysts were observed in two layer hens. The cysts in the serosawere lined with single layers of squamous or cuboidal cells. The papillary proliferationsof columnar cells were also observed in one case. The smooth muscle layer or mass wereobserved around the cysts in both cases. The cystic lining cells were positive forpan-cytokeratin, vimentin, S100 and Wilms tumor 1. Ultrastructurally, they had sparselymicrovilli on the luminal surface. The histological results indicated the present caseswere multicystic mesothelioma, but also had characteristics of Mullerian epithelium. Thisis the first report describing the detailed pathological feature of unique multicystictumor in chicken.