a 23- year old sex worker presents to the emergency department for evaluation of pelvic pain and fever. her pregnancy test is negative. her last period was 1 week ago and normal. cbc reveals and elevated wbc. on pelvic examination, she has cervical motion and tenderness and a right adnexal mass that is larger than 5cm in diameter and is extremely tender to palpation. what is the most likely cause of this adnexal mass
