Testicular granulosa cell tumors (TGCTs) are rare tumors of sex cord-stromal origin. TGCTs are classified into two main categories, the adult type and the juvenile type. The adult type is extremely rare, with only 93 known cases reported in the literature. Herein, we present a report of a case of a 30-year-old male patient who presented with a testicular mass and underwent radical inguinal orchiectomy; the pathology examination revealed an adult-type granulosa tumor. Additionally, we review the literature to summarize the scientific knowledge of an entity barely described worldwide.
