A 16 year old with mild acute right sided pelvic pain presen…
A 16 year old with mild acute right sided pelvic pain presents to the sonography lab. History reveals normal menstrual periods, negative urine pregnancy test and normal WBC count. Sonographic imaging reveals the pathology shown in the attached image. A follow up exam 8 weeks later demonstrates normal pelvic anatomy. Based on the image and history, provide a diagnosis along with a detailed rationale for your answer.