. Some points in the surgery of the brain and its membranes . er, inasmuch as clinically andsurgically they are all tumours. The following is a list of cerebral tumoursthe majority of which are of surgical im-portance :— Intra-Cranial Tumours. I. Epiblasdc tumours— A. Cerebroma, B. Glioma, glio-sarcoma, angio-glioma. C. Epithelioma. Developed from the epi- thelium of the ependyma, the choroidplexus, the pineal gland, or the pituitarybody. D. Cholesteatoma vera. OF TUMOUR OF THE BRAIN 159 II. Mesoblastic tumours— A. Sarcoma ; of skull, of meninges, of brain substance (probably arising from thew
. Some points in the surgery of the brain and its membranes . er, inasmuch as clinically andsurgically they are all tumours. The following is a list of cerebral tumoursthe majority of which are of surgical im-portance :— Intra-Cranial Tumours. I. Epiblasdc tumours— A. Cerebroma, B. Glioma, glio-sarcoma, angio-glioma. C. Epithelioma. Developed from the epi- thelium of the ependyma, the choroidplexus, the pineal gland, or the pituitarybody. D. Cholesteatoma vera. OF TUMOUR OF THE BRAIN 159 II. Mesoblastic tumours— A. Sarcoma ; of skull, of meninges, of brain substance (probably arising from thewalls of the intracerebral vessels), ofthe pineal gland, of the pituitary body. B. Endothelioma ; meningeal. (The fibro- plastic tumour of Lebert.) C. Fibroma. Fibro-sarcoma. D. Psammoma. Angio-lithic sarcoma. III. Secondary tumours: metastases from carcinoma or sarcoma of other regions. IV. Cysts. — Simple cysts. Hasmorrhagic cysts. Parasitic cysts. Intra- and extra-duraldermoids. V. Tuberculous Vascular tumours.— :/ Fig. 62.—Glioma of frontal lobe. (R. C. S. Museum, 52, A. A section through the right hemisphere, showing a large rounded glioma, 3inches in diameter, which occupies the whole of the frontal lobe. Anteriorly andabove, the tumour projects upon the free surface ; below, it is bounded by a thinband of brain substance. Its margin is well defined ; its section is homogeneousand in parts flocculent. From a man, aged 25, who had been for a long time undertreatment with double optic neuritis, occasional convulsions, and paresis on one attempt was made, but failed, to get at the tumour to enucleate it. (Presentedby Dr. Goodhart, 1885.) i6o SOME POINTS IN THE SURGERY
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