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Overall Survival Associated With Ileostomy Closure in Patients With Rectal Cancer Before and After Adjuvant Therapy.

Background: A diverting loop ileostomy is commonly constructed to protect a distal anastomosis after proctectomy for rectal cancer. Little data are available on whether closing the ileostomy before or after adjuvant chemotherapy affects survival.

Methods: We conducted a retrospective review of patients with rectal cancer who underwent a low anterior resection with diverting loop ileostomy followed by adjuvant chemotherapy at Ochsner Medical Center. The primary outcome was the long-term survival in patients who had their loop ileostomies closed before chemotherapy (BC) vs after chemotherapy (AC).

Results: Seventy-two patients were identified (22 in the BC group vs 50 in the AC group). No difference in mean age (BC 59.5 ± 9.8 vs AC 59.2 ± 12.6, P =0.9) or preoperative clinical stage was seen between study groups. The mean interval from ileostomy creation to closure was significantly shorter in the BC group vs AC group (16.9 ± 14.5 weeks vs 33.6 ± 18.1 weeks, P =0.0001). Follow-up data revealed a similar mean duration from surgery to last contact (BC 50.6 ± 23.6 months vs AC 43.5 ± 22.1 months, P =0.23) and similar overall survival (BC 86% vs AC 70%, P =0.23) between groups.

Conclusion: Long-term survival was similar in patients who underwent ileostomy closure before and after adjuvant therapy following low anterior resection for rectal cancer. While this study was underpowered, it adds additional insight to an area of surgery lacking significant data. The timing of ileostomy closure should be individualized for each patient.

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