Preoperative iron supplementation: improving postoperative recovery in colorectal cancer patients

Colorectal cancer remains one of the most common cancers worldwide, accounting for significant morbidity and mortality[1,2]. Surgical resection is the standard curative treatment for most patients; however, surgical outcomes can be adversely affected by various factors, including preoperative anemia[3,4]. Anemia is prevalent in patients with colorectal cancer due to chronic disease, malnutrition, and tumor-induced blood loss[5]. This condition not only diminishes the patient’s overall health but also leads to increased postoperative complications, longer hospital stays, and higher healthcare costs[6]. As a result, the management of preoperative anemia has become a critical area of focus in improving short-term surgical outcomes, particularly through the use of iron supplementation and patient blood management (PBM) strategies. Addressing anemia preoperatively reduces the need for perioperative transfusions, which are associated with immunosuppression and adverse postoperative events. A recent study by Takashima et al. investigated the impact of preoperative anemia and perioperative transfusion on short-term outcomes in colorectal cancer surgery[7]. In this retrospective analysis of 545 patients, 52.8% were found to have preoperative anemia, and severe anemia was associated with significantly higher rates of postoperative complications, including infections and anastomotic leakage. The study also explored the role of iron supplementation with ferrous citrate, showing that patients who received supplementation experienced an improvement in hemoglobin levels and a reduced need for perioperative transfusions. Patients receiving iron therapy had fewer postoperative complications and shorter hospital stays, underscoring the efficacy of preoperative anemia management in optimizing surgical outcomes in colorectal cancer patients. Anemia is a prevalent condition in patients undergoing colorectal cancer surgery, with estimates suggesting that 30–40% of patients present with anemia at the time of surgery[8,9]. The causes of anemia in these patients are multifactorial, ranging from chronic inflammation and malnutrition to iron deficiency due to tumor-induced bleeding. Several studies have demonstrated the negative impact of preoperative anemia on surgical outcomes[10,11]. Therefore, identifying and correcting anemia before surgery has become a key goal in perioperative patient management. Patient blood management strategies that focus on optimizing hemoglobin levels, reducing transfusions, and improving recovery have emerged as critical components of preoperative care. Iron supplementation is a cornerstone of treating preoperative anemia, especially in cases of iron deficiency, which is common among colorectal cancer patients[12]. Oral iron supplements, such as ferrous citrate, are frequently used to raise hemoglobin levels before surgery[13]. In cases where rapid correction of anemia is needed, intravenous iron may be administered to achieve faster improvements in hemoglobin[14]. Patients who receive preoperative iron supplementation generally experience improved hemoglobin levels, a reduced need for blood transfusions, and better postoperative recovery[15]. The use of iron supplementation also aligns with broader patient blood management strategies, which seek to minimize transfusions due to their associated risks, including immunosuppression and increased infection rates. Optimizing hemoglobin levels through iron supplementation can enhance oxygen delivery to tissues, improving wound healing and reducing the risk of postoperative complications[16]. Perioperative blood transfusions, although sometimes necessary, are associated with a range of adverse outcomes[17]. Transfusions have been linked to immunosuppression, which increases the risk of postoperative infections, including surgical site infections and pneumonia[18]. Additionally, transfusions can contribute to longer hospital stays, increased healthcare costs, and higher postoperative mortality rates. Several studies have shown that patients who avoid transfusions due to successful preoperative anemia management experience fewer complications and better overall recovery[19,20]. Reducing transfusions is not only beneficial from a clinical perspective, but also aligns with the principles of patient-centered care, minimizing the risks associated with invasive interventions and improving patient quality of life. Iron supplementation has emerged as a key intervention for improving surgical outcomes and reducing the need for transfusion. Further research is needed to explore the optimal timing and methods of administering iron supplementation, as well as to assess the long-term benefits of preoperative anemia correction on postoperative recovery and cancer recurrence rates. Moreover, patient blood management strategies should be integrated into routine preoperative care for patients with colorectal cancer, with a focus on minimizing the need for perioperative transfusions and enhancing overall recovery. Clinicians must adopt a multidisciplinary approach involving surgeons, anesthesiologists, hematologists, and nutritionists to optimize patient outcomes. In conclusion, preoperative anemia is a significant risk factor for adverse outcomes after colorectal cancer surgery. Addressing anemia using strategies such as iron supplementation can improve hemoglobin levels, reduce the need for perioperative transfusions, and enhance short-term surgical outcomes. As patient blood management continues to evolve, the integration of iron supplementation and other anemia-correcting strategies will play a crucial role in optimizing care for patients with colorectal cancer undergoing surgery.