A case of benign cystic mesothelioma arising from the lesser omentum in a 13-year-old girl treated through a laparoscope excision

Abstract Benign cystic mesotheliomas (BCMs) are extremely rare tumors usually occurring in females of reproductive age. A 13-year-old Japanese girl presented with abdominal pain, and an adnexal cystic tumor was suggested by images. At