The thirty-eight patients with acute idiopathic polyneuritis who were hospitalized at Department of Pediatrics of Kyushu University from 1962 through 1968, were studied. Twenty-three of the 38 patients were male and other fifteen pat ients were female. Preceeding illnesses occurred in 21 patients: upper respiratory infections, 14, diarrhea, 5, mumps, one, and acute otitis media, one.
