Malnutrition and Sarcopenia Screening in Chemotherapy Patients

Inclusion Criteria: * Age ≥ 18 years * Diagnosed with a solid tumor (e.g., breast, lung, GI, gynecologic cancers) * Receiving active outpatient chemotherapy * Recent abdominal CT scan within the last 3 months or planned * Provided written informed consent * Physically and mentally able to complete study procedures Exclusion Criteria: * Declined or unable to give informed consent * Cognitive impairment or mental status preventing participation * Neuromuscular diseases affecting muscle mass (e.g., myopathy, MND, severe neuropathy) * Inadequate CT image quality for L3 analysis * Acute infection or illness within the past month * Upper limb deformity or severe pain preventing handgrip testing * Incomplete assessments or withdrawal of consent during the study