This case study discusses a 56-year-old female patient with multifactorial failure to thrive, malnutrition, and anorexia nervosa, alongside a history of alcohol abuse and rheumatoid arthritis. Her hospitalization included assessments of leukocytosis and malnutrition, leading to a complex treatment plan that involved nutrition support and monitoring for refeeding syndrome. The patient's prognosis remains complicated due to malignancy and underlying health conditions, necessitating ongoing oncological follow-up.