Imperforate Hymen

Introduction

• Description: An imperforate hymen is the most commonly encountered anomaly that results from abnormalities in the development or canalization of the müllerian ducts.

• Prevalence: Uncommon. Thought to be 1/5000 live-born females.

• Predominant Age: Generally not diagnosed until puberty; occasionally diagnosed soon after birth (mucocolpos).

• Genetics: No genetic pattern.

Etiology and Pathogenesis

• Causes: Failure of the endoderm of the urogenital sinus and the epithelium of the vaginal vestibule to fuse and perforate during embryonic development.

• Risk Factors: None known.

Signs and Symptoms

• Vaginal obstruction

• Primary amenorrhea

• Cyclic abdominal pain

• Hematocolpos

• Urinary retention

Diagnostic Approach