Abstract
The current study describes the clinical, gross, histopathologic, and immunohistochemical findings of a T-cell lymphoma in a captive porcupine (Coendou prehensilis), a species typically seen in the tropical forests of Brazil. At necropsy, extensive neoplastic involvement was observed in the cervical lymph nodes, with extension into the salivary gland. The spleen was mildly enlarged, and neoplastic nodules were grossly evident in the liver and right kidney. Histologically, sheets of large and markedly pleomorphic round cells were observed in the cervical lymph nodes, lung, liver, spleen, and kidney. The neoplastic cells were positive for cluster of differentiation (CD)3 and negative for CD79a by immunohistochemistry.
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