Prepubertal Genital Bleeding: Examination and Differential Diagnosis in Pediatric Female Patients

Prepubertal genital bleeding can be caused by a variety of etiologies including trauma, infection, structural, hematologic disorders, precocious puberty, and malignancy. Urethral prolapse can be seen in prepubescent girls due to a relative estrogen deficiency. Urethral prolapse classically presents with urethral mass and vaginal bleeding, often associated with constipation. A healthy 6-year-old White girl presented to the Pediatric Emergency Department (ED) with vaginal bleeding for 1 day preceded by a few months of constipation. In the ED the patient's physical examination was remarkable for a tender, nonmobile mass at the vaginal introitus. Transabdominal pelvic and renal ultrasounds were unremarkable. The emergency physician's working diagnosis was a vaginal mass concerning for sarcoma botryoides. Pediatric and Adolescent Gynecology (PAG) was consulted. They performed an examination under anesthesia (EUA) with cystoscopy and vaginoscopy. The EUA confirmed a urethral prolapse approximately 2 cm in diameter. The patient was treated with conjugated estrogen vaginal cream. At her 1-month follow-up, the urethral prolapse had resolved. Performing a proper pelvic examination of a prepubescent girl presenting with vulvovaginal bleeding is crucial to form an accurate diagnosis in the ED setting. By placing the young girl in the frog-leg or knee-chest position and using both lateral and downward traction of the vulva, one can adequately visualize the external genitalia and outer 1/3 of the vagina. This can help streamline diagnosis and avoid unnecessary examinations and anxiety.