MSFinals-3428
A 27-year-old woman presents to the Emergency Department with a 5-day history of vomiting. She has vomited 6 times a day for the past 5 days. When asked about pregnancy, she states her periods are irregular. On examination, her chest is clear, heart sounds are normal and she has a non-tender but distended abdomen. Her temperature is 37ºC, oxygen saturation 98% on air, heart rate 110 beats per minute, respiratory rate 20 breaths per minute, and blood pressure 110/70 mmHg. Blood results: Hb 118 g/L Male: (135-180) Female: (115 – 160) Platelets 160 * 109/L (150 – 400) WBC 5.6 * 109/L (4.0 – 11.0) CRP 4 mg/L (< 5) βhCG 453,000 mIU/ml. What is the most likely diagnosis?