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Chapter V

Eating disorders - F50


    Excludes:
  • anorexia NOS ( R63.0 )
  • feeding:
  • difficulties and mismanagement ( R63.3 )
  • disorder of infancy or childhood ( F98.2 )
  • polyphagia ( R63.2 )
F50.0 Anorexia nervosa
A disorder characterized by deliberate weight loss, induced and sustained by the patient. It occurs most commonly in adolescent girls and young women, but adolescent boys and young men may also be affected, as may children approaching puberty and older women up to the menopause. The disorder is associated with a specific psychopathology whereby a dread of fatness and flabbiness of body contour persists as an intrusive overvalued idea, and the patients impose a low weight threshold on themselves. There is usually undernutrition of varying severity with secondary endocrine and metabolic changes and disturbances of bodily function. The symptoms include restricted dietary choice, excessive exercise, induced vomiting and purgation, and use of appetite suppressants and diuretics.
    Excludes:
  • loss of appetite ( R63.0 )
  • psychogenic ( F50.8 )
F50.1 Atypical anorexia nervosa
Disorders that fulfil some of the features of anorexia nervosa but in which the overall clinical picture does not justify that diagnosis. For instance, one of the key symptoms, such as amenorrhoea or marked dread of being fat, may be absent in the presence of marked weight loss and weight-reducing behaviour. This diagnosis should not be made in the presence of known physical disorders associated with weight loss.
F50.2 Bulimia nervosa
A syndrome characterized by repeated bouts of overeating and an excessive preoccupation with the control of body weight, leading to a pattern of overeating followed by vomiting or use of purgatives. This disorder shares many psychological features with anorexia nervosa, including an overconcern with body shape and weight. Repeated vomiting is likely to give rise to disturbances of body electrolytes and physical complications. There is often, but not always, a history of an earlier episode of anorexia nervosa, the interval ranging from a few months to several years.
Bulimia NOS
Hyperorexia nervosa
F50.3 Atypical bulimia nervosa
Disorders that fulfil some of the features of bulimia nervosa, but in which the overall clinical picture does not justify that diagnosis. For instance, there may be recurrent bouts of overeating and overuse of purgatives without significant weight change, or the typical overconcern about body shape and weight may be absent.
F50.4 Overeating associated with other psychological disturbances
Overeating due to stressful events, such as bereavement, accident, childbirth, etc.
Psychogenic overeating
    Excludes:
  • obesity ( E66.- )
F50.5 Vomiting associated with other psychological disturbances
Repeated vomiting that occurs in dissociative disorders (F44.-) and hypochondriacal disorder (F45.2), and that is not solely due to conditions classified outside this chapter. This subcategory may also be used in addition to O21.- (excessive vomiting in pregnancy) when emotional factors are predominant in the causation of recurrent nausea and vomiting in pregnancy.
Psychogenic vomiting
    Excludes:
  • nausea ( R11 )
  • vomiting NOS ( R11 )
F50.8 Other eating disorders
F50.9 Eating disorder, unspecified


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