Apparent Clitoromegaly in Healthy Female Newborn

Cysts of the external female genitalia are uncommon findings and can be either congenital or acquired. Congenital cysts of the external female genitalia may be discovered from the initial newborn examination and cause concern for clitoromegaly or ambiguous genitalia. We describe a clitoral cyst presenting as apparent clitoromegaly in a newborn; this is the third reported case in the literature. We also review the differential and evaluation for clitoromegaly in a newborn. We present a case of a 1-day-old newborn, with concern for clitoromegaly on initial newborn examination. Multiple anatomy ultrasounds were performed during pregnancy and no genital abnormality was noted. On physical examination, a 1 × 1 cm cyst was found on the clitoral hood obstructing the clitoris and vaginal opening. There were no signs of virilization or hyperandrogenism on examination. The cyst was aspirated, with clear, serous fluid removed. Normal female anatomy and normal clitoris size were noted after aspiration. She had no recurrence of the cyst in the months after discharge. Clitoral cysts of the female external genitalia are rare findings. Baring signs of virilization of hyperandrogenism, conservative management and watchful waiting or cyst drainage are reasonable approaches.