MRCP2-2616
A 30-year-old female patient arrived at the Emergency Department complaining of lower abdominal pain and vomiting that had been going on for a day. She reported having normal bowel movements. Upon examination, her blood pressure was 140/80 mmHg and her temperature was 37.9oC. Her abdomen was tender in both iliac fossae, but soft. Digital rectal examination revealed anterior tenderness, and speculum examination showed tenderness and profuse white-yellow vaginal discharge. A pregnancy test came back negative. What is the most probable diagnosis?