8650/3 Leydig cell tumor, malignant


Interstitial cell tumor, malignant


Testis/Male genital organs
ICD-O-3 topography code: C62-C63
ICD10: C62-C63

A Leydig cell tumor characterized by large tumor size, and the presence of cytologic atypia, increased mitotic activity, necrosis, and vascular invasion. Approximately 10% of the testicular Leydig cell tumors show malignant characteristics and metastasize.