Eating Disorders

The November death of an Israeli fashion model whose weight had dropped below 60 lb was chilling even in a world that prizes rail-thin models as an ideal of feminine chic. Social critics have long blamed the fashion industry's use of such models for inspiring teenagers and young women to engage in extreme dieting. But at the recent Annual Meeting of the California Psychiatric Association, in Huntington Beach, eating disorders expert Walter Kaye, MD, reminded attendees that the causes of anorexia nervosa (AN) relate more to genetics and neurobiology than to size-zero models on catwalks.1

Binge eating disorder is more common than anorexia and bulimia combined, according to a national survey, but many physicians are unaware of the problem. The guidance and evidence discussed here highlight the key issues in recognizing and managing the disorder.

The inclusion of parents in their children's treatment for eating disorder is not universally accepted. However, recent studies suggest that families should be included in treatment and that they are often a powerful resource for helping their children recover.

Although psychosis is rare in adolescent patients with anorexia nervosa restricting type, the possibility should be explored because it may be the underlying cause of the eating disorder.

Diagnosis of the two main major eating disorders, anorexia nervosa and bulimia nervosa, can be difficult because of denial of symptomatology by the patients and problems with some of the diagnostic criteria. Although CBT has been the most effective, there are no treatments available that can guarantee a cure for either disorder. Medication is only a helpful adjunct to the treatment of anorexia, while many controlled studies that show antidepressant medications are effective in reducing binge/purge behavior in bulimia.

Although eating disorders have been considered to be largely sociocultural in origin, findings from family, twin and molecular genetic studies conducted during the last decade are refuting that perspective. Recent studies have had significant success in isolating specific chromosome regions that may harbor susceptibility loci for anorexia and bulimia nervosa and are helping to shed light on the degree of heritability of eating disorders.

Anorexia nervosa, bulimia nervosa and binge-eating disorder remain challenging disorders for the practicing psychiatrist. While psychopharmacological agents play an important role in the overall treatment of eating disorders, current empirical evidence does not support their sole use. A recipe consisting of evidence-based psychopharmacological agents together with evidence-based psychotherapeutic approaches is usually required for a successful outcome.

While anorexia nervosa was the first eating disorder to be recognized through the 19th century reports of Gull (1874) and Lassque (1873), bulimia nervosa and the less well-defined eating disorder not otherwise specified (EDNOS) syndromes are more common.