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Hematocolpos secondary to imperforate hymen
International Journal of Emergency Medicine volume 3, pages481–482 (2010)
A previously healthy 12-year-old female was sent to the Emergency Department by her pediatrician for workup of severe suprapubic abdominal pain radiating to her lower back. She reported having waxing and waning pain for 1 month that had awoken her from sleep the previous evening. The patient denied nausea, vomiting, and diarrhea, but reported mild urinary retention. Per history she was premenarchal.
Her vital signs were heart rate (HR), 83; blood pressure, 129/85 mmHg; temperature, 36.1 ºC. Physical exam revealed a healthy adolescent female with signs of both thelarche and adrenarche. Her abdomen was soft and non-tender, but notable for a palpable pubic mass. All blood and urine laboratory tests, including β-HCG, were normal. Ultrasound examination revealed a 13.7 × 8.0 × 8.8-cm complex fluid-filled structure extending inferiorly from the uterus, obscuring visualization of the cervicovaginal junction. A genitourinary exam revealed an imperforate hymen. A diagnosis of hematocolpos secondary to imperforate hymen was made and surgically confirmed.
Imperforate hymen occurs in approximately 1 in 1,000 females , and found incidentally on physical exam (43%), it is treatable and does not cause significant morbidity . If not screened for and treated early, patients present at menarche with a history of cyclical pelvic or abdominal pain and urinary retention due to hematocolpos. Physical exam findings may include a palpable abdominal mass and an intact bulging blue hymen [3, 4]. Potential complications of delayed diagnosis include retrograde menstruation and rarely ruptured hematosalpynx . Diagnosis is supported by history, physical exam, and ultrasound findings, and should prompt immediate consultation with a gynecologist  (Figs. 1, 2 and 3).
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