A retrospective study on the usefulness of the In Bag technique in laparoscopic cystectomy for ovarian mature cystic teratomas

Rupture of mature ovarian cystic teratoma is often secondary to surgical procedures such as laparoscopic ovarian cystectomy, resulting in chemical peritonitis. We use a method of placing a bag under the tumor during laparoscopic ovarian cystectomy (In-Bag method) to prevent chemical peritonitis in our hospital. We retrospectively reviewed laparoscopic ovarian cystectomy performed in our hospital from 2020 to 2023, divided into an In-Bag method group and a Without In-Bag method group. No chemical peritonitis due to spillage of the cyst contents was observed．Compared to the Without In-Bag group, the In-Bag group had significantly shorter operative time (83 minutes vs. 88 minutes) and significantly lower C-reactive protein levels (0.5 mg/dL vs. 0.8 mg/dL). These results suggest that incorporation of the In-Bag method was associated with improved surgical outcomes.