Gastrointestinal tract is a system which includes oesophagus, stomach, small and large intestine, pancreas and hepatobiliarytract. Many gastrointestinal disordes accompay malignant diseases.
Many of these disorders are caused directly by malignantdiseases many of them occure like toxicity of treatment - surgery, radiotherapy, cytostatic therapy, targeted biology treatmentor immunotherapy. Intervention must be selected according to type of disorder, its severity and status of a patient.