Up to 30% of patients with cancer have lost weight before diagnosis and approximately 80% of patients with advanced cancer suffer a loss of weight of more than 10% during the course of the disease. The incidence of malnutrition is very variable depending on:
• Tumor (type, location, stage). As well, cancers of the pancreas, stomach, esophagus, area ENT (head and neck) and lung are the most at risk to have anorexia, and cachexia.
• Treatment. The association of radio (RT) and chemotherapy (ct), especially in tumors of the area ENT, esophagus, rectum, anus, or Pancoast (apex lung), is associated with a high risk of thinning exacerbated by the difficulty
to swallow or to evacuate the faeces, or by the fear to eat because of the pain of the wounds that cause these treatments, on the mouth, esophagus or anal canal.
Unlike what happens in digestive tumors (esophagus, pancreas, and biliary tract, colon, rectum); of the head and neck, lung and ovary, is not so frequent the loss of weight in brain tumours, breast, bone, skin, or in the urological (prostate, kidney, bladder, testis), regardless of the type of treatment.
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