A case of malignant dysgerminoma in a slaughtered dairy cow
2015
Jung, J.Y., Division of Animal Disease Diagnosis, Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Her, J.W., Division of Animal Disease Diagnosis, Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Jeong, Y.J., Division of Animal Disease Diagnosis, Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Ku, K.N., Gyeonggi-do Veterinary Service, Suwon, Republic of Korea | Choi, K.R., Gyeonggi-do Veterinary Service, Suwon, Republic of Korea | So, B.J., Division of Animal Disease Diagnosis, Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Yoon, S.S., Division of Animal Disease Diagnosis, Animal and Plant Quarantine Agency, Anyang, Republic of Korea
An abnormally enlarged right ovary and a mass in fat surrounding the right kidney were discovered in a dairy cow during routine postmortem examination at slaughter. The ovary was dark reddish and multinodular in shape. Numerous cystic structures were identified in the mass. Histopathologically, the ovary was completely replaced with large, uniform, polyhedral neoplastic cells containing vesicular nuclei and prominent nucleoli. The mitotic index was high. In the lymphatic vessels, tumor emboli were observed. Another mass in the fat surranding the right kidney had the same histological features as the ovarian mass. This animal was diagnosed with malignant dysgerminoma and metastasis to other peritoneal organs.
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