Perineal US in the diagnosis of a prostatic utricle cyst in an infant.

The formation of a prostatic utricle cyst is a congenital abnormality in the involution of Müllerian ducts. This report describes an infant boy with bilateral epididymitis and a prostatic utricle cyst detected using a perineal US approach. According to our literature review, the use of US to detect this abnormality is rare. The perineal approach provides a better visualization of the cyst than the abdominal approach, and the relation between the cyst and the adjacent anatomic structures can be determined.