The Instability of Eating Disorder Diagnoses

Eating disorders are rarely static. Symptoms fluctuate, waxing and waning as circumstances change. Often, these fluctuations lead to diagnostic crossover–between subtypes of one disorder or to a different eating disorder altogether. The heterogeneity of symptom severity and frequency led to the establishment of the “eating disorder not otherwise specified” diagnosis in the Diagnostic and Statistical Manual. Essentially, it is everything that doesn’t quite fit into the “anorexia nervosa” or “bulimia nervosa” categories. (For example, I would guess that it is a common diagnosis for patients who fail to meet the “amenorrhea” criterion for the AN diagnosis.)

ED-NOS is a category for everything that doesn’t conform to some rather arbitrary criteria required for bulimia nervosa and anorexia nervosa, meaning: it is the diagnosis for a lot of people. Okay, that’s not very scientific, I know, but I wouldn’t trust these numbers anyway–usually people who fall into this category don’t feel “sick … Continue reading →

The Genetics of Anorexia Nervosa

Is it the culture of thinness, obsession with dieting or just bad mothering? When it comes to determining the causes of anorexia nervosa, the answer appears to be none of the above. Increasingly, the evidence is pointing to genetics playing an important role in predisposing individuals to anorexia nervosa. Among clinicians and researchers, the notion that genetic factors are important in the development of anorexia nervosa seems uncontested. In this short review, Dr. Cynthia Bulik and colleagues summarize some of the findings in the genetics of anorexia nervosa.

Currently (DSM-IV), to be diagnosed with anorexia nervosa, a patient must show:

  • An inability to maintain normal weight (<85% of what is expected)
  • Intense fear of weight gain and/or becoming fat, though underweight
  • Obsession with body weight and shape, giving it undue importance in evaluating self-esteem/self-worth
  • Amenorrhea (missing 3 or more consecutive periods)
  • There are two AN-subtypes: restricting type (AN-R) and
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