Brain surgery . FlG. 55.—The Cerebral Axis. Basal Ganglia. Crura. Pons, and Medulla, with theCranial Nerves.—Allan Thompson. face of the skull to be accessible (see Fig. 56). Andtherefore, in estimating the number of the cerebraltumors in this collection which might have been the TREPHINING FOR TUMOR OF THE BRAIN. 211 subject of surgical treatment, this class, constitutingone-third of the number, must be at once next to tumors of the cerebellum, we find. Fig. 56.—Photograph (Fraser) of a Dissection showing the Situation of thebasal ganglia, cerebellum, pons, medulla, and spinal
Brain surgery . FlG. 55.—The Cerebral Axis. Basal Ganglia. Crura. Pons, and Medulla, with theCranial Nerves.—Allan Thompson. face of the skull to be accessible (see Fig. 56). Andtherefore, in estimating the number of the cerebraltumors in this collection which might have been the TREPHINING FOR TUMOR OF THE BRAIN. 211 subject of surgical treatment, this class, constitutingone-third of the number, must be at once next to tumors of the cerebellum, we find. Fig. 56.—Photograph (Fraser) of a Dissection showing the Situation of thebasal ganglia, cerebellum, pons, medulla, and spinal cord, and their relation tothe other parts. The entire cortex of the left hemisphere has been removed soas to expose the basal ganglia and the left cerebellar hemisphere. that they number 1-11. They are twice as commonin children as in adults. Thus in a collection ofAmerican cases of cerebral tumor without regard to 212 BRAIN SURGERY. age which I have made, I find that of 45 cerebraltumors 3 occurred below the age of nineteen, while of2!) cerebellar tumors 11 occurred below the age ofnineteen. It is, therefore, evident that children are es-pecially liable to develop cerebellar tumors. The re-sults of attempts at the removal of cerebellar tumorswill be carefully considered further on in this chapter,but it may be stated here that they are most difficultto reach or to remove. Multiple tumors form the next class in the table, 60in number, and these must be at on
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