Background/aim: During low anterior rectal resection for rectal cancer, a protective ileostomy (PI) is routinely created to reduce the severity of anastomotic complications. The aim of this study was to investigate the side-effects of PI during adjuvant chemotherapy.
Patients And Methods: A retrospective cohort of patients was operated on for non-metastatic rectal cancer with a PI during 2005-2022. Patients treated with adjuvant chemotherapy (AC) were compared with those not receiving AC. A subgroup analysis compared patients with early PI closure (<10 weeks) and those with a PI in place during chemotherapy.
Results: A total of 242 patients were included: 178 (73.6%) without adjuvant chemotherapy and 64 (26.4%) with. History, tumour location, neoadjuvant treatment and postoperative follow-up were similar for both groups. Patients treated with AC had a greater risk of renal failure (37.5% vs. 14.6%, p=0.0002), ionic disorders (45.3% vs. 26.9% p=0.008), malnutrition (23.4% vs. 5.6%, p=0.0002) and rehospitalization (35.9% vs. 18.5% p=0.007). Patients treated with AC needed significant dose adjustments of oxaliplatin in 40.6% of cases, this adjustment being higher in patients with a PI compared to patients with early closure (47.1 vs. 9.1%, p=0.021).
Conclusion: Presence of a PI during chemotherapy predisposes to increased episodes of renal failure, and requires major adaptation of chemotherapy doses, especially of oxaliplatin.
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