%0 Case Reports %T Diagnostic features of metastatic endometrioid carcinoma in a captive black-tufted marmoset (Callithrix penicillata). %A de MacĂȘdo IL %A de Sousa DER %A Mattioli M %A Borges BP %A Mendes de Lima EM %A de Castro MB %J J Med Primatol %V 53 %N 4 %D 2024 Aug %M 39099092 %F 0.821 %R 10.1111/jmp.12727 %X A captive marmoset developed metastatic endometrioid carcinoma (EnC), a rare uterine tumor in non-human primates (NHPs). The neoplasm showed marked microscopical malignant and tubulopapillary aspects, immunopositivity for pan-cytokeratin, CK7, estrogen receptor, and a high mitotic index (Ki-67). These features may contribute to the diagnosis and therapeutics of EnC in NHPs.