Unilateral seminoma with multiple visceral metastases in a duck (Anas platyrhynchos)
Résumé
A case of unilateral seminoma with visceral metastases in a Mallard duck (Anas platyrhynchos) is reported. Right testis appeared markedly enlarged. The liver surface showed multifocal to coalescent regular circular umbilicated white-greyish spots. In addition, multiple rough whitish nodules were evident on pancreas and visceral peritoneum lining the intestine. Histologically, the right testis parenchyma was diffusely affected and replaced by neoplastic growth, consisting of sheets of large round to polyhedral cells with conspicuous vesicular nuclei having a chromatin network and prominent nucleoli. Similar features were observed also in the other affected organs. Multiple lung metastases were detected on histology. This is the first known report of seminoma with hepatic, pancreatic, pulmonary and peritoneal metastases in a Mallard duck.
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