A 15-year-old adolescent girl is brought into the ED by her mother for severe abdominal and pelvic pain with dysuria. The patient is otherwise healthy, with no significant past medical history. She is not sexually active and denies any trauma. Upon questioning, the patient states that she has had cyclical abdominal pain over the past year and a half, which typically lasts 2 to 3 days, and then self resolves. She has not yet started her menses. This is the first time that the pain has been 10/10 in severity, and she has new urinary urgency, with inability to fully empty her bladder. On physical examination, she is Tanner stage V for breast and pubic hair development, her abdomen is soft with no palpable mass, and she has no costovertebral angle tenderness. On visual inspection of her perineum, she is noted to have a large, bulging purplish mass in her vaginal area with a small leak of blood.
Are there any laboratory tests that you should order? What imaging—if any—would be the best choice for confirming the diagnosis? Should you try to release the pressure and evacuate the blood?
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