The occurrence of lipomas within the central nervous system is sufficiently uncommon that most cases have stimulated considerable attention. These lesions have been encountered both in the spinal canal and within the cranium. Ehni and Love1 have reviewed the literature on intraspinal lesions and present a detailed discussion of the problem. They include data on 29 cases of intradural and 20 cases of extradural lipomas. Lipomas of the brain are somewhat more numerous, and about 110 cases have been reported. These have occurred in the following areas, in this order of frequency: the corpus callosum, the ventral aspect of the diencephalic structures, the choroid plexus of the lateral ventricles, and the dorsal aspect of the midbrain. Except for the lesions in the corpus callosum, these tumors are ordinarily of little importance and were frequently encountered incidentally at autopsy. In the corpus callosum, however, lipomas were frequently sizable and were