[Assessment and nutritional treatment in the oncogeriatric patient. Differential aspects]

The incidence of cancer increases as age progresses. With aging, and with a chronic disease such as cancer, the prevalence of disease-related malnutrition (DRE), sarcopenia, cachexia and frailty increases. These are associated with mortality, toxicity due to antineoplastic treatment and post-surgical complications. In this article, the prevalence of DRE, sarcopenia and cachexia, the way to diagnose these situations in the daily clinic, their pathophysiology, their relationship with clinical prognosis, and the evidence on the effectiveness of medical nutrition treatment and multimodal therapy, with physical exercise as the main ally, are reviewed differentially in older patients. At the moment, there are few guidelines that refer only to the elderly patient, and until more studies are generated in this group of patients, the actions, in matters of nutrition, should be based on those already published in general oncology. If the elderly patient has malnutrition, and this can condition quality of life or clinical prognosis, medical nutrition therapy should progress, individually, from dietary advice to more complex forms of treatment such as oral supplementation, enteral nutrition or parenteral nutrition.