The International journal of eating disorders
-
A male adolescent with an anorexia nervosa-restricting type reported about his habit to carry out severe exercises to hold his weight. Seven weeks after admission to hospital, laboratory findings showed an extremely high level of serum creatinine kinase (CK) (>20,000 U/L) without clinical signs for rhabdomyolysis or renal depression. ⋯ This is the first reported case of anorexia nervosa with this extremely high level of serum CK, induced by excessive physical activity.