Chronic tubal ectopic pregnancy: a rare but challenging diagnosis.

A 34-year-old woman without any medical history presented to our hospital emergency unit with a history of 4 days of progressively increasing pain in the left iliac fossa, fever and vaginal bleeding for the past 3 weeks. Urine pregnancy test and serum bhCG were negative. CT scan showed a left pelvic mass compatible with a tubo-ovarian abscess. After transfer to our gynaecology unit, transvaginal ultrasound revealed an empty uterus with a heterogeneous mass in the left adnexal area. We performed a laparoscopy, which revealed an enlarged left haematosalpinx with firm adhesions to the surrounding organs, but no abscess. A total left salpingectomy was undertaken and the histopathological examination revealed the presence of chorionic villi, suggesting the diagnosis of chronic ectopic tubal pregnancy. The postoperative course was uneventful.