A 15-year-old adolescent girl who was taking an oral contraceptive presented to the emergency department with left lower quadrant abdominal pain that had developed gradually over a 3-day period. She had no associated nausea, vomiting, diarrhea, hematochezia, bloating, or anorexia. She reported no precipitating factors for the pain and had no history of pregnancy, abdominal surgery, or abdominal trauma. Over the previous 2 years, the patient had experienced similar intermittent episodes of abdominal pain lasting approximately 1 week. Results from laboratory tests, upper endoscopy, colonoscopy, and an abdominal computed tomography scan performed 1 year prior to presentation were normal.