The purpose of this project was to review the literature related to the demographic, clinical, anthropometric, and nutrition therapy characteristics of inpatient preadolescents and adolescents diagnosed with anorexia nervosa (AN). The literature review includes an overview of the prevalence and diagnostic criteria for AN, screening and evaluation of patients, inpatient treatment protocols, the complications associated with AN, and nutrition treatment options (oral diet, enteral feeding, and parenteral nutrition).