MSFinals-1631
A 27-year-old woman presents to the Emergency Department with abdominal pain and nausea for the past few hours. She has irregular menstrual cycles and cannot recall her last period. The patient appears distressed and unwell, with tenderness noted in the right iliac fossa upon examination. Speculum examination is unremarkable, but cervical excitation and right adnexal tenderness are present on vaginal examination. Vital signs reveal a temperature of 37.8 °C, blood pressure of 90/60, heart rate of 110 bpm, and respiratory rate of 22 with oxygen saturations of 100% on room air. A positive urine beta-human chorionic gonadotropin (β-HCG) test is obtained, and the urine dipstick shows 1+ leukocytes and 1+ blood. What is the most likely diagnosis?