Myelitis as a complication of measles is rare. Only 4 cases have been reported in the American literature.1 Ford2 reviewed the world literature in 1928 and listed 29 cases of myelitis complicating measles. Rydeen and Glaser1 found the reports of 8 cases since 1928, most of which are in the European literature. Little is known about the etiology and pathogenesis. Many observers believe that the condition is an acute inflammatory process caused by the neurotropic virus of measles. Finley3 stated the opinion that allergy plays an important part in the pathogenesis. He based this belief on the fact that the complication appears at the height of the virus-antibody reaction and suggested that the myelitis is the result of a hypersensitive response on the part of the nervous system. Rivers and Schwenkter,4 working with monkeys, produced a demyelination encephalomyelitis by the repeated intravascular injection of a