[Unusual testicular tumor: Leydig, Sertoli, and granulosa cell mixed tumor]

We report an unusual case of a mixed granulosa-Sertoli-Leydig cell testicular tumor in a 16 year old man, who presented with bilateral gynaecomastia. A few cases have been published in the literature. Based on a case report, the authors describe the clinical, histopathological and therapeutical features of this rare affection.