[Multimodal oncological therapy concepts, chemotherapy and immunosuppressive drugs: effects on surgical morbidity and mortality].

Systemic chemotherapy, targeted therapies and radiotherapy for patients with malignant tumors lead to unfavorable surgical conditions with increased risks of postoperative complications. For gastric cancer and cancer of the esophagogastric junction, surgery after neoadjuvant treatment is associated with a mortality of approximately 5 %. Given the increase in metastatic surgery for colorectal carcinoma, surgeons should be aware of the specific side effects of therapeutic drugs to ensure an optimal course of treatment. The impact of chemotherapy-induced hepatic lesions on postoperative development is unclear. Bevacizumab treatment should be stopped at least 5 weeks before surgery to reduce the risk of thromboembolic events, bleeding and wound healing complications. Immunosuppressive and immunomodulating agents alter wound healing and preoperative alterations should be carefully evaluated. For patients with chronic corticosteroid therapy, perioperative supplementation should be considered when planning surgery as well as routine dosages.