Source:http://linkedlifedata.com/resource/umls/id/C0334409
NCI: A benign neoplasm of the testis originating from interstitial (Leydig) cells.,NCI: A Leydig cell tumor which does not recur or metastasize. Morphologically, there is no evidence of cellular atypia, increased mitotic activity, necrosis, or vascular invasion.