Review Question - QID 214733

A 31-year-old woman presents to the emergency department with a 3-hour history of increasing abdominal pain. She says that the pain started after dinner but cannot recall anything in particular that might have caused it. The pain is located in her right lower abdomen and feels sharp. Otherwise, she has noticed drops of blood on her underwear and says that her last menstrual period was about 8 weeks ago. Her past medical history is significant for 2 previous pregnancies that were delivered by cesarean section. On presentation, her temperature is 99°F (37.2°C), blood pressure is 106/71 mmHg, pulse is 105/min, and respirations are 21/min. Physical exam reveals tenderness to palpation in the right lower quadrant as well as a tender mass near the right ovary. Which of the following would most likely be seen in this patient by transvaginal ultrasound?