Bilateral testis tumors in an infant: synchronous teratoma and epidermoid cyst.

Teratoma ranks second in frequency to yolk sac carcinoma among testicular germ cell tumors in infants, accounting for 25% of cases. Testicular teratomas are uniformly benign in children younger than 24 months old. Epidermoid cysts are tumor-like lesions of unknown etiology, probably monodermal teratomas, comprising 3% of all pediatric testis tumors. Bilaterality is rare for both tumors. We report a case of a synchronous left testis teratoma and a right testis epidermoid cyst. Appropriate therapy is discussed.