Abstract
The author reported eleven patients with brainstem edema on cranial CT. Nine had acute encephalopathy or Reye syndrome and the other two had acute encephalitis. Seven cases died and four cases survived. Dead cases showed brainstem edema significantly faster than the survivers. Laboratory examinations revealed significant differences of LDH, platelet and HCO3- between the two groups. Six patients died in the winter. The duration of convulsion was more than 30 minutes in all the dead cases.