In the localization of intracranial tumors it is customary to think in terms of specific symptoms and observations characteristic of the area involved. Not infrequently symptoms and indications may be present which are "characteristic" of involvement of certain localities, and yet the lesion may be elsewhere. In order to determine the frequency of such confusing phenomena we have reviewed a series of intracranial tumors verified at operation or necropsy. In this series of 183 cases there were 24 (13.1 per cent) that presented such phenomena.
CEREBRAL TUMORS WITH IPSOLATERAL AND BILATERAL PHENOMENA
In the 140 supratentorial tumors there were certain observations in four cases which might have led to confusion as to the side involved. In a tumor of the right frontal lobe (case 1) there was a papilledema on the right side and a primary optic atrophy on the left side. Foster Kennedy2 called attention to a syndrome
DOWMAN CE, SMITH WA. LOCALIZING DIAGNOSIS IN BRAIN TUMOR: PHENOMENA THAT MAY BE MISLEADING. JAMA. 1931;96(5):318–325. doi:10.1001/jama.1931.02720310008002
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