Cystadenocarcinoma Characterized by Ciliated Epithelium in Bovine Ovary

Abstract

Cystadenocarcinoma of the ovary was found in a 20-year-old Japanese Black cow. Macroscopically, neoplastic masses composed of cysts were seen on the serous surfaces of the abdomen and omentum major. Metastatic lesions were observed in the pulmonary lymph nodes. Histologically, the cysts were composed of ciliated and non-ciliated epithelia. Electron microscopically, the ciliated epithelium was rich in fibrils and fibrillar bundles. The non-ciliated epithelium was sparse of organelles. Both epithelia were connected with each other with desmosomes. A basement membrane was seen at the base of the epithelia, which were surrounded by fibroblasts.