Nervous and mental diseases . ascular color and asoft consistency quite like that of the brain-substance. Glioma is emi-nently an infiltrating and a destructive growth. Its outlines are difficultto determine. Owing to its strangulating effect, the center of a glioma isfrequently filled with softened detritus and fatty-degeneration products,which may become fluid and the growth thereby cystic. Many allegedlocal brain-hypertrophies have been gliomatous infiltration in fact,and the microscopic examination of cyst-walls has alone discoveredthe true nature of the lesion in other instances. The favo
Nervous and mental diseases . ascular color and asoft consistency quite like that of the brain-substance. Glioma is emi-nently an infiltrating and a destructive growth. Its outlines are difficultto determine. Owing to its strangulating effect, the center of a glioma isfrequently filled with softened detritus and fatty-degeneration products,which may become fluid and the growth thereby cystic. Many allegedlocal brain-hypertrophies have been gliomatous infiltration in fact,and the microscopic examination of cyst-walls has alone discoveredthe true nature of the lesion in other instances. The favorite locationof glioma is the white substance near the cortex, and it may infiltratelarge areas, even the greater part of a hemisphere. Ordinarily it is consistency they are soft, often highly vascular, and may in somecases be easily mistaken for angiomata. Hemorrhages not infrequently 254 DISEASES OF THE BE AIX FRO PEE. occur in them. In other cases a great amount of interstitial fluid givesthem a myxoid Fig. 97.—Glioma of cerebellum containing recent and old hemorrhages.
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