F50 EATING DISORDERS
F50.0 Anorexia nervosa
A. Weight loss, or in children a lack of weight gain, leading to a body weight of at least 15% below the normal or expected weight for age and height.
B. The weight loss is self-induced by avoidance of "fattening foods".
C. A self-perception of being too fat, with an intrusive dread of fatness, which leads to a self-imposed low weight threshold.
D. A widespread endocrine disorder involving the hypothalamic-pituitary-gonadal axis, manifest in the female as amenorrhoea, and in the male as a loss of sexual interest and potency (an apparent exception is the persistence of vaginal bleeds in anorexic women who are on replacement hormonal therapy, most commonly taken as a contraceptive pill).
E. Does not meet criteria A and B of Bulimia nervosa (F50.2).
Comments: The following features support the diagnosis, but are not necessary elements: self-induced vomiting; self-induced purging; excessive exercise; use of appetite suppressants and/or diuretics.If onset is pre-pubertal, the sequence of pubertal events is delayed or even arrested (growth ceases; in girls the breasts do not develop and there is a primary amenorrhoea; in boys the genitals remain juvenile). With recovery, puberty is often completed normally, but the menarche is late.
F50.2 Bulimia nervosa
A. Recurrent episodes of overeating (at least two times per week over a period of three months) in which large amounts of food are consumed in short periods of time.
B. Persistent preoccupation with eating and a strong desire or a sense of compulsion to eat (craving).
C. The patient attempts to counteract the fattening effects of food by one or more of the following:
(1) self-induced vomiting;
(2) self-induced purging;
(3) alternating periods of starvation;
(4) use of drugs such as appetite suppressants, thyroid preparations or diuretics. When bulimia occurs in diabetic patients they may choose to neglect their insulin treatment.
D. A self-perception of being too fat, with an intrusive dread of fatness (usually leading to underweight).
Patients with eating disorders have in common the core psychopathology of extreme concerns about body shape and weight.
Hospitalization; 20% below expected weight
Treatment : fluoxetine
Differentiating points b/w Anorexia Nervosa & Bulimia nervosa is failure to maintain body weight 85% of the normal weight Amenorrhoea in 100% cases