Juvenile granulosa cell tumor

Epidemiology

• Typically occurs in children 4 years old or younger, with most cases occurring before 1 year of age

• Accounts for 1%–5% of all prepubertal testis tumors

• Most common congenital testicular neoplasm and the most common cause of testicular enlargement in newborns younger than 6 months

• Rare cases reported in adults

• Approximately 30% reported in patients with cryptorchidism

• Usually unilateral; rare bilateral cases reported