Testicular leydig cell tumor revealed by hydrocele.

Leydig cell tumor (LCT) is a rare testicular tumor with a low incidence accounting 3% of all testicule neoplasms. Due to its rarity, the natural history of LCT is poorly understood. Patients can present with atypical symptoms and endocrine disorders. The diagnosis of LCT is based on histological and immunohistochemical examination. We report a new case of leydig cell tumor in a 61-year-old man presenting with a left testis hydrocele. The patient underwent a left orchidectomy and the diagnosis of LCT was established. Even in front of a benign pathology such as hydrocele, exploration is necessary to detect any testicle tumor.