Diseases of the nervous system : a text-book of neurology and psychiatry . s usually from 496 TUMORS OF THE BRAIN forty to seventy years old, and are mostly of the basilar. They causepressure symptoms at times, with obstructive symptoms—basilar syn-drome—or they rupture and produce symptoms of cerebral hemorrhage.^Symptoms.—Brain tumors, even of a large size, may be found atautopsy, and yet not have given rise to any recognized are thus frequently found in children. With moreprecise investigation such latent tumors are becoming rarer, especiallysince the importance of me
Diseases of the nervous system : a text-book of neurology and psychiatry . s usually from 496 TUMORS OF THE BRAIN forty to seventy years old, and are mostly of the basilar. They causepressure symptoms at times, with obstructive symptoms—basilar syn-drome—or they rupture and produce symptoms of cerebral hemorrhage.^Symptoms.—Brain tumors, even of a large size, may be found atautopsy, and yet not have given rise to any recognized are thus frequently found in children. With moreprecise investigation such latent tumors are becoming rarer, especiallysince the importance of mental symptoms—psychoses, so-called hys-terias, etc.—unaccompanied by sensorimotor syndromes, is becomingrecognized. Many small tumors, especially osteomata, psammoma,slowly developing and circumscribed gliomata, choleosteomata causevery few symptoms. Occasionally a tumor will show monosymp-tomatically, as by epileptic convulsions, mild speech disturbances, mildsensory defects, optic, olfactory, auditory hallucinations or hemian-opsia, without being Fig. 242.—Gumma of brain. The symptoms are best considered as (1) general and (2) local orfocal. The general symptoms are indicative of the effects of the tumoras a whole, irrespective of its special nature or localization. They aredue in general to the effects of increased intracranial pressure, whichin certain tumors, notably of the posterior fossa and cerebellum, appearsearly and is usually marked even with small tumors, whereas tumorselsewhere often may show little of such pressure symptoms. Some-times the focal symptoms appear before the general ones. Generalsymptoms rarely have any localizing diagnostic value as many of themmay lie remote from the site of the tumors. Some of the general symp- 1 Beadles, Brain, 1907, p. 285; Reinhardt, Ueber Hirnarterienaneurysmen und ihreFolgen, Mitt. aid. Grenzg. d. Med. u. Ch., 1913, xxvi. GENERAL SYMPTOMS 497 toms of pressure, cranial nerve palsies for example, may e
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