disease has location testicular Leydig cell tumor https://www.malacards.org/card/testicular_leydig_cell_tumor GARD:0023375 Leydig cell tumour of the testis A sex cord-stromal tumor that arises from the testis and is characterized by the presence of cells that resemble the successive stages of development of Leydig cells. It usually presents as a painless testicular mass. Gynecomastia is present in approximately thirty percent of the cases. Libido may be decreased. In children, precocious puberty may be present. A minority of cases exhibit malignant characteristics. Leydig cell neoplasm of testis Leydig cell neoplasm of the testis MONDO:0003124 SCTID:67871000119105 Leydig cell tumor of testis Leydig cell tumour of testis MEDGEN:163584 testis Leydig cell tumor NCIT:C6356 testis Leydig cell tumour testicular Leydig cell neoplasm testicular Leydig cell tumor UMLS:C0863027 DOID:4756 testicular sex cord-stromal neoplasm Leydig cell tumor testis