Paratesticular rhabdomyosarcoma mimicking complicated epididymal cyst.

Paratesticular rhabdomyosarcoma (RMS) is a rare nongerm cell intrascrotal malignant tumor in children and young adult/teens resulting from the mesenchymal tissues of the tunica vaginalis, epididymis, spermatic cord, and testis. RMS accounts for approximately 7% of all genitourinary tract RMSs and 12% of all pediatric scrotal neoplasms. Patients usually present with a painless unilateral scrotal mass. We report a 16-year-old boy with a paratesticular RMS mimicking epididymal cyst. To our knowledge, this is the first case reported in the literature presenting as an epididymal cyst.