The Patient-Generated Subjective Global Assessment (PG-SGA) is a tool used to evaluate the nutritional status of patients, particularly those with chronic illnesses like cancer. It combines patient-reported information on weight loss, food intake, symptoms, and physical function with a clinical assessment of body composition. The PG-SGA provides a score that helps identify malnutrition and guides nutritional interventions. It is widely used in healthcare to improve patient outcomes through targeted nutritional support.