Abstract
Rhabdomyolysis, myoglobinuria, hyperpyrexia, muscle weakness and stiffness occurred in a 4-yr-old boy after halothane anesthesia and a single dose of suxamethonium. Neurological examination of the patient and his mother revealed no physical abnormality although in both the serum creatine kinase and lactic dehydrogenase concentrations were increased. McArdle''s disease was excluded by a normal response to an ischemic work test.