ovarian cyst

A 28-year-old woman presents to the emergency department with sudden onset of severe right lower abdominal pain. She reports nausea but no vomiting. Her last menstrual period was two weeks ago, and she is not sexually active. On examination, she has tenderness in the right lower quadrant with guarding. Her vital signs are stable. A pelvic ultrasound shows a 5 cm cyst on the right ovary with free fluid in the pelvis. What is the most likely diagnosis?

A 28-year-old woman presents to the emergency department with sudden onset of severe right lower abdominal pain. She reports nausea and vomiting but denies fever or urinary symptoms. Her last menstrual period was two weeks ago, and she is sexually active. On examination, she has tenderness in the right lower quadrant with guarding. A pelvic ultrasound reveals a 5 cm right ovarian cyst with free fluid in the pelvis. What is the most likely diagnosis?