H Gao, S Yan, SC Chan, L Sun

Abstract

Imperforate hymen (IH) is a rare malformation of the female reproductive tract. Diagnosis is often missed or delayed due to nonspecific symptoms or inadequate physical examination in early stages of life, sometime leading to serious consequences. A 2-day-old girl was found a cystic pelvic mass in on antenatal scans, initially suspected to be a teratoma. Postnatal ultrasound confirmed the presence of the cystic structure and bilateral hydronephrosis. Blood urea nitrogen and creatinine level were elevated and progressively worsen over time. A gynaecological examination revealed the absence of a vaginal opening with bulging at the vaginal introitus. The infant underwent hymenectomy, and the girl remained healthy throughout her follow-up visits. Carefully physical examination is crucial for early diagnosis and a multidisciplinary approach is necessary in paediatric hospital.