The impact of immunonutrition in head and neck cancer surgery: a systematic review with meta-analysis

Objective: Malnutrition is common among patients undergoing surgery for head and neck cancer (HNC), leading to higher postoperative complications and mortality rates. Immunonutritional intervention has potential in reducing these risks by enhancing immune function and aiding wound healing. Methods: A systematic review and meta-analysis were conducted according to PRISMA guidelines. Nineteen randomised controlled trials involving 1,196 participants undergoing surgery for HNC were included. Studies comparing immunonutrition with standard care were analysed for outcomes including fistula formation, wound infections, other infections, and length of hospital stay. Results: Immunonutrition significantly reduced postoperative fistulas and shortened hospital stays compared to standard care. The impact on wound and systemic infections was inconclusive. Immunonutrition was generally well-tolerated, with no significant increase in adverse events. Conclusions: These findings highlight the potential benefits of immunonutrition in improving postoperative outcomes for patients with HNC. However, the variability in study outcomes and limitations in quality call for further research to clarify the specific efficacy, long-term effects, and cost-effectiveness of immunonutrition in this context.