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Hydrocolpos is the distension of the vagina caused by accumulation of fluid due to congenital vaginal obstruction. The obstruction is often caused by an imperforate hymen or less commonly a transverse vaginal septum. The fluid consists of cervical and endometrial mucus or in rare instances urine accumulated through a vesicovaginal fistula proximal to the obstruction. In some cases, it is associated with Bardet-Biedl Syndrome.[1] If it occurs in prepubertal girls, it may show up as abdominal swelling. It may be detected by using ultrasound. It may also present at birth as a distended lower abdomen and vagina. It also associated with vaginal atresia.


  1. ^ "Bardet-Biedl Syndrome - NORD (National Organization for Rare Disorders)". NORD (National Organization for Rare Disorders). Retrieved 2017-12-23.