Radiation-Induced Bowel Complications: Laparoscopic Versus Open Staging of Gynecologic Malignancy

Abstract

To evaluate whether the type of surgical approach used to stage gynecologic malignancies influences the risk of developing nonrectal radiation-induced intestinal injury (NRRIII) in patients who subsequently receive adjuvant radiotherapy. A prospectively entered database was queried for all women with either primary or recurrent gynecologic malignancy who underwent external-beam radiation therapy±brachytherapy and who had prior abdominopelvic surgery at our institution. Univariate and multivariate analysis of variables potentially affecting the risk of developing significant bowel toxicity (defined as grade 2 or more according to Radiation Therapy Oncology Group scoring) were performed. One hundred fifty-nine patients were identified. The site of primary tumor was the cervix in 61(38%) patients and the corpus uteri in the remaining patients (98, 62%). Treatment was delivered with a combination of external-beam and intracavitary irradiation to 50 (31.4%) patients, and 109 (68.6%) patients received only external-beam irradiation. Staging procedures were performed by open surgery in 93 (58.5%) patients, whereas laparoscopy was the surgical approach of choice in 66 (41.5%) women. Fifteen patients (9.4%) developed grade 2 or greater NRRIII, at median latency of 10months (range 3-64months); six were diagnosed as grade 3 complications requiring surgery, and three developed grade 4 complication. Multiple regression revealed an independent protective effect of pretreatment laparoscopic staging against the risk of developing both grade ≥2 and grade ≥3 NRRIII. Notwithstanding potential limitations of nonrandomized study design, our findings suggest that the benefits of minimal-access surgery used to perform staging procedures may translate into long-term reduction in radiation-induced bowel injury.