MONDO_0020813 (benign testicular sertoli cell tumor) is a non-metastasizing sex cord-stromal tumor that arises from the testis. Morphologically, it is characterized by the presence of Sertoli cells forming tubules. Leydig cells are rare or absent. Also known as: benign sertoli cell neoplasm of testis, benign sertoli cell neoplasm of the testis, benign sertoli cell tumor of testis, benign sertoli cell tumor of the testis, benign sertoli cell tumour of testis, benign sertoli cell tumour of the testis, benign testicular sertoli cell neoplasm.