Diagnostic features of metastatic endometrioid carcinoma in a captive black‐tufted marmoset (Callithrix penicillata).

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. [ABSTRACT FROM AUTHOR]