A case of composite neoplasm of ovary in a goat having histological features of thecoma and metastatic adenocarcinoma

A carcass of eight year old female goat of non-descript breed was brought for post-mortem examination. The animal died with a history of weakness and emaciation. On necropsy, the pelvic cavity revealed presence of a large ovarian growth weighing about 1.5 kg with presence of hemorrhagic and necrotic foci on the surfaces. Lungs, pericardium, pleural cavity showed the presence of many small clusters/bunches of white nodules. Histopathological examination of the ovarian parenchyma showed proliferation of cuboidal epithelial cells with numerous mitotic figures. The solid sheets of neoplastic cells in fibro-vascular stroma with several concentric layers of calcified tissue (psamoma bodies) were evident in the ovarian parenchyma. The regional lymph nodes also revealed metastatic adeno- carcinomatous lesions replacing the lymphoid tissuewith proliferating cuboidal neoplastic epithelial cells. Patho-morphological diagnosis was done based on the features of metastasis, extensive proliferation and mitotic figures asthecoma and metastatic adenocarcinoma of ovary which is very rare findings in domestic animals.