In this short space it is possible only to outline certain important conclusions in regard to the histology of the tumors of the sheaths of the nervous system without including the detailed discussion that they deserve. But I may take this opportunity of apologizing to those other students of this subject whose work is not cited here, however conscious I may be of my debt to them.
From the point of view of neurology and neurosurgery it is of the utmost importance that one nomenclature be adopted throughout the world, and that the temptation of substituting new terms for old ones be resisted unless the new terms express an important change in the conception of the neoplastic entity involved. I shall deal with the primary tumors of the meninges and nerve sheaths.
TUMORS OF THE MENINGES
1. Meningeal Fibroblastoma (Psammoma, Dural Endothelioma, Meningioma).
—These tumors form a well recognized entity.
PENFIELD W. TUMORS OF THE SHEATHS OF THE NERVOUS SYSTEM. Arch NeurPsych. 1932;27(6):1298-1309. doi:10.1001/archneurpsyc.1932.02230180027004