This document provides research findings, a discussion of etiology, case studies, and treatment approaches for anorexia nervosa. The research findings classify the anorexic patient by sex, age, presenting characteristics, socioeconomic status, premorbid personality, and cultural and familial characteristics. The etiology of anorexia nervosa is presented according to four major theories: biochemical, neuroendocrinological, developmental, and familial. Two anecdotal case studies are presented in detail. Treatment is reviewed according to correlates of success and interventions. Phases of treatment follow from identification of disorder, to body system stabilization, to therapeutic intervention. Various drugs found effective in treatment are reviewed as well as therapeutic interventions, including psychotherapy, hypnosis and biofeedback, and behavior modification. A bibliography is included. (BL)