Anorexia nervosa with hyperthyroidism: case report

Clinical signs of hypometabolism in anorexia nervosa may result from the "low triiodothyronine syndrome," in which thyroxine (T4) and thyroid stimulating hormone are usually normal, but triiodothyronine (T3) is in a range compatible with hypothyroidism. A case in which anorexia nervosa presented with unsuspected hyperthyroidism is reported.