[Multimorbid patients in visceral surgery-Upper gastrointestinal tract].

The treatment of multimorbid patients in oncological surgery of the upper gastrointestinal tract requires a differentiated consideration of every single risk factor in order to provide a holistic assessment. This article focuses on pre-existing diseases that are particularly relevant for elective esophageal and gastric surgery and have practical clinical consequences. In this way a differtiation is made between metabolic, vascular, cardiopulmonary and organ-specific risks. The aim of this work is to provide practical guidelines for complex and multimorbid cases. Given the multifactorial interrelationships, the importance of a thorough preoperative evaluation and interdisciplinary management cannot be overemphasized.