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Purpose Anemia is common among patients with colorectal cancer and is associated with an increased risk of complications and poorer survival rate. The main objective of our study was to determine the effect of preoperative intravenous iron supplementation therapy on the need for red blood cell transfusions, other postoperative complications, and length of hospital stay in colon cancer patients undergoing colon resection. Methods In this retrospective cohort study, data were collected from medical records of all 549 colon carcinoma patients who underwent a colon resection in Helsinki University Hospital during the years 2017 and 2018. The patients were divided into two cohorts: one with anemic patients treated with preoperative intravenous iron supplementation therapy (180 patients) and one with anemic patients without preoperative intravenous iron supplementation therapy (138 patients). Non-anemic patients and patients requiring emergency surgery were excluded (231 patients). Results Patients treated with intravenous iron had less postoperative complications (33.9% vs. 45.9%,  p  = 0.045) and a lower prevalence of anemia at 1 month after surgery (38.7% vs. 65.3%,  p  &lt; 0.01) when compared with patients without preoperative iv iron treatment. No difference was found in the amount of red blood cell transfusions, length of stay, or mortality between the groups. Conclusion This is the first study demonstrating a significant decrease in postoperative complications in anemic colon cancer patients receiving preoperative intravenous iron supplementation therapy. This treatment also diminishes the rate of postoperative anemia, which is often associated with a facilitated recovery.

international journal of colorectal disease

Preoperative intravenous iron treatment reduces postoperative complications and postoperative anemia in preoperatively anemic patients with colon carcinoma