Splenic T-cell lymphoma in a North American River Otter ().

Background: Splenic lymphoma is commonly reported in domestic ferrets (), but very rarely reported in wild species, including otters. One report described B-cell splenic lymphoma in an Asian small-clawed otter () that metastasized and was the primary reasoning for humane euthanasia (Stedman and Mills, 2014).

Case Description: The current report describes a case of splenic T-cell lymphoma in a captive North American river otter (). The otter died several weeks after splenectomy and no evidence of metastasis was found on gross necropsy or histopathological evaluation.

Conclusion: The splenectomy performed on this individual was presumptively curative for its splenic lymphoma. Extensive myocardial fibrosis was found, and suspected to have caused severe cardiac arrhythmia leading to acute death.