Imperforate hymen and vaginal atresia and their associated anomalies.

The presenting features and associated abnormalities of imperforate hymen and vaginal atresia were studied in 24 girls under the age of 16 years. Hydrocolpos or hydrometrocolpos occurred in 8 infants, 13 older girls developed haematocolpos, but 3 of the girls had no distension of the genital tract. Seven of the older girls were diagnosed as having appendicitis. Anorectal anomalies were present in 9 of the children. Intravenous pyelography was performed on 16 girls and was normal in only one. Urinary tract investigations are indicated in all girls with vaginal outlet obstruction, and the vaginal orifice should be inspected in all girls with anorectal abnormalities.