DOI: 10.1111/jmp.70118 ISSN: 0047-2565

Bilateral Leydig Cell Tumor in a Capuchin Monkey ( Sapajus apella ): Case Report

Ewerton Lourenço Barbosa Favacho, Sandla Freitas da Silva, Jamerson Luiz Brito da Silva, Daniella Kaísa de Oliveira Bezerra, Valíria Duarte Cerqueira, Gabriela Riet Correa Rivero, Pedro Soares Bezerra Júnior
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ABSTRACT

Leydig cell tumors (LCTs) are uncommon in nonhuman primates (NHPs). A bilateral LCT was identified in a 20‐year‐old male capuchin monkey ( Sapajus apella ) maintained under human care. Ultrasonography revealed a right testicular nodule, while necropsy identified bilateral testicular masses. Histopathology confirmed bilateral LCT. This case documents bilateral LCT in S. apella , a rare finding in NHPs.

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