[Multi-modal therapy concepts in gastrointestinal tumors].

A large variety of adjuvant and neoadjuvant treatment concepts were developed during the recent years to improve the results of gastrointestinal tumors. There exist generally accepted guidelines for adjuvant treatment of colon and rectal cancer, while for the tumors of the upper gastrointestinal tract convincing results of randomized studies are still missing. Therefore ongoing and future studies have to find out, which patients could have a benefit from multimodal therapy.