Kercachexie (cachexia = Greek for ‘bad condition’) is clinical syndrome characterized by increased weight loss and malnutrition. In people with cancer when the tumor has spread comes kankercachexie syndrome in varying frequency and intensity. 
What are the causes of kankercachexie?
The causes of kankercachexie include: reduced food intake, increased nutritional needs, abnormal loss of nutrients, metabolic disruption.
When should people with cancer to go watch their diet?
The image of the severely malnourished cancer is the cancer care available. However, deteriorating nutritional status in people with cancer is often at much earlier stage disease. In healthy people is weight loss because of lack of food especially loss of fat. In cancer, however, changes the metabolism and there is loss of equal parts fat and lean body mass, as muscles and organs. For people with cancer means one kilogram weight loss of one pound of muscle. Even someone with relatively high body weight can result in poor nutritional condition. Overweight people do have the more fat but less muscle than lean people. Considerations for nutrition measures of medical and social in nature or are based on the desire of the individual. Malnutrition will delay the healing process. This is due to the occurrence of complications such as infections or reduction in overall functioning (due to decreased muscle strength, fatigue, apathy and depression). There is decrease in well being, longer hospitalization and higher mortality due.
What is the diet?
There is no standard diet in cancer. What dietary advice is given depends on the type of cancer, treatment, symptoms, prognosis, possibilities and wishes of the individual. Initially, assuming diet composed of foods which person is accustomed to use. In addition, supplement might help. A dietitian can advise you or browse this site for more information.