Although chemotherapy and chemoradiation therapy improve the clinical outcomes and decrease locoregional failure in patients with advanced cancer, they may lead to an increased risk of malnutrition in these patients due to their gastrointestinal side effects. Many cancer patients are already malnourished as a result of their cancer-bearing status. Consequently, these patients experience poor clinical outcomes due to various infectious and noninfectious complications. Nutritional management that is based on frequent monitoring of the nutritional status of patients can ensure that they receive adequate calories and certain nutrients, which is vital to improve their clinical outcomes and quality of life.
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