Ultrasonic detection of persistent small unilateral hematocolpos in two girls

Two girls with unilateral hematocolpos are reported. In both cases, a small amount of blood which had accumulated in the partially obstructed hemivagina was detected by real-time high resolution ultrasonography, and was confirmed by magnetic resonance imaging. Both patients were asymptomatic, and were regularly followed up at an outpatient clinic. To date, the hematocolpos persists but continues to be small.