Iron Deficiency Anemia in Colorectal Cancer Patients: Is Preoperative Intravenous Iron Infusion Indicated? A Narrative Review of the Literature.

Iron deficiency anemia is the most common extraintestinal symptom in patients with colorectal cancer (CRC). Inflammation associated with malignancy leads to functional iron deficiency via the hepcidin pathway, whereas chronic blood loss causes absolute iron deficiency and depletion of iron stores. The assessment and treatment of preoperative anemia is of great importance in patients with CRC, since published data have consistently shown that preoperative anemia is associated with increased need for perioperative blood transfusions and more postoperative complications. Recent studies have documented mixed results regarding the preoperative intravenous iron administration in anemic CRC patients in terms of efficacy for anemia correction, cost-effectiveness, need for transfusions and risk for postoperative complications.