8650/3 Leydig cell tumor, malignant
SynonymsInterstitial cell tumor, malignant
|Testis/Male genital organs|
|ICD-O-3 topography code:||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.