Background: Fallopian tube abscess in adolescent virgins is very rare，it may lead to long-term or even lifelong complications once it occurred. Case: A 12-year-old adolescent virgin with no history of sexual intercourse and previous physical fitness who presented with lower abdominal pain with nausea and vomiting for 22 hours. Laparoscopic surgery revealed an abscess in the left fallopian tube，the left fallopian tube was surgically removed and the pus was cultured for E. coli. Summary and Conclusion: It is important to consider pelvic abscess in the differential diagnosis of adolescent virgins with clinical symptoms of acute abdomen.E. coli may be the causative agent.

Safe abortion is an important aspect of reproductive health, and unsafe abortion remains a growing female problem, a public health problem, and one of the leading causes of maternal mortality in many developing countries. 1,2 Worldwide, 25% of pregnancies end in abortion and more than 50 million abortions are performed annually. 3 The consequences of unsafe abortion include not only physical but also psychological problems. 4 Internationally, safe abortion and high-quality periabortion management can curb maternal deaths, [5][6][7][8] with stricter periabortion period management employed for women with repeat abortions. 9

Background Upstream infection with vaginal flora can develop into tubal endothelial damage and tubal edema, which can lead to tubal obstruction and fallopian tube abscess if left untreated. Fallopian tube abscess in adolescent virgins is very rare, it may lead to long-term or even lifelong complications once it occurred. Case presentation A 12-year-old adolescent virgin with no history of sexual intercourse and previous physical fitness who presented with lower abdominal pain with nausea and vomiting for 22 h, body temperature up to 39.2 °C. Laparoscopic surgery revealed an abscess in the left fallopian tube, the left fallopian tube was surgically removed, successfully treated, and the pus was cultured for escherichia coli. Conclusion It is important to consider possibility of tubal infection in young.