title: Identical twins with mature cystic teratomas treated with laparoscopic surgery: Two case reports.
abstract: Mature cystic teratomas are the most common among all ovarian neoplasms, representing 30-40% of the cases. However, to the best of our knowledge, there have been only two reports of mature cystic teratomas occurring in identical twins to date. We herein report a case of identical twins with mature cystic teratomas who were treated with laparoscopic surgery. A 32-year-old woman was referred to our hospital due to a tumor in the right ovary. The patient underwent laparoscopic resection of the ovarian tumor and the pathological diagnosis was benign mature cystic teratoma. Two years later, the identical twin of the abovementioned patient was referred to our hospital also due to a right ovarian tumor. The patient underwent laparoscopic resection of the ovarian tumor and the pathological diagnosis was benign mature cystic teratoma. Therefore, for early diagnosis, it may be important to consider the possibility of mature cystic teratoma in the identical twin of a patient, even in the absence of symptoms.
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Mabuchi
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Nami
authors.initials: N
authors.lastname: Ota
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Kobayashi
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tanizaki
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Sawako
authors.initials: S
authors.lastname: Minami
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Wakayama Medical University, Wakayama 641-0012, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ino
keywords: familial occurrence; identical twins; laparoscopic surgery; mature cystic teratoma; ovarian tumor