Progressive Thorium Dioxide Myelopathy

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Abstract
THIS seems to be an era of steadily increasing use of many contrast mediums in an effort to study and diagnose various problems. This practice is increasing in all branches of medicine but especially in delineating the nervous system and its vascular supply. This is good, and certainly none can detract from the great advances in neurologic surgery that have been made possible by the pioneer studies of Dandy1 with air, Egas Moniz et al.2 with cerebrovascular investigations and the numerous other methods that have been employed to make the various areas of the central nervous system more easily and . . .