Temporary intraperitoneal breast implant spacer to facilitate safe stereotactic body radiotherapy for recurrent high-grade serous ovarian carcinoma.

Background: Recurrent ovarian cancer involving the upper abdomen can be challenging to treat with radiation therapy due to the proximity of bowel. Spacer technologies have been used in other malignancies to displace radiosensitive organs, but they are not routinely employed in gynecologic oncology. Case: We report the case of a 71-year-old woman with a germline BRCA1 mutation and recurrent high-grade serous carcinoma following secondary cytoreduction with right hepatectomy and diaphragmatic resection. Surveillance imaging demonstrated a right upper quadrant abdominal wall recurrence overlying the hepatic flexure, precluding safe stereotactic body radiation therapy (SBRT). Following multidisciplinary review, the patient underwent an exploratory laparotomy with adhesiolysis and placement of a saline-filled breast implant in the right upper quadrant to exclude bowel from the radiation field. Postoperative CT confirmed displacement of the colon, and the patient subsequently received one fraction of SBRT to the abdominal wall. The implant was removed uneventfully two days later. The patient recovered well, and subsequent imaging two months later showed the desired reduction in RUQ disease. Conclusion: This is the first report, to our knowledge, of the use of a breast implant as a temporary spacer to facilitate safe SBRT in recurrent ovarian cancer. This removable, cost-effective approach offers a feasible solution for anatomically constrained upper abdominal recurrences in close proximity to the bowel.