Acute Urinary Retention due to Haematometrocolpos from Imperforate Hymen in a Pubescent Nigerian Girl

Cryptomenorrhoea is an uncommon gynaecological condition in the adolescent age group. While cyclical abdominal pain is the usual clinical symptom, patients with atypical presentation require a high index of suspicion and meticulous evaluation.

This case report describes atypical presentation of haematometrocolpos in a pubescent Nigerian female.

A case of acute urinary retention in an adolescent girl, due to haematometrocolpos, is presented. A 13-year-old supposedly premenarcheal girl presented at the Children Emergency Unit of the Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria with acute urinary retention of twelve hours' duration. There was no preceding history of difficulty with voiding. About 1,200mls of urine was drained from the bladder with a self-retaining catheter. Examination revealed an 18-week-sized cystic abdomino-pelvic mass, and the vagina was closed with a bulging membrane at the introitus. Abdomino-pelvic ultrasonography revealed a distended uterus containing fluid with low level echo, typifying the ground-glass appearance. Trans-hymenal ultrasonography using a 2.5-7.5MHz endocavitary probe confirmed a ballooned-out vagina with similar content, with a 2mm thick hymen at the distal end.

Hymenectomy was performed with spontaneous drainage of the menstruum. She was discharged after successful trial of voiding without catheter.

Though uncommon, haematometrocolpos from lower genital obstruction should be considered as a differential diagnosis of lower urinary tract obstruction in pubescent girls. Trans-hymenal ultrasonography is accessible and accurate for assessing the level of obstruction and the thickness of the intervening tissue.