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February 7, 1931


Author Affiliations

From the Department of Roentgenology, Hospital of the University of Pennsylvania.

JAMA. 1931;96(6):408-411. doi:10.1001/jama.1931.02720320008002

Many brain lesions give few or no localizing signs, even though they have been subjected to repeated thorough neurologic examinations. Dandy1 states that approximately 40 per cent of brain tumors can be localized by neurologic methods and that assistance from the routine roentgen examinations of the head may be expected in only 10 to 15 per cent of the cases. Frazier2 feels that Dandy's percentage of localization of brain tumors by neurologic methods is too low. He states that his percentage of localization is from 60 to 70 per cent by neurologic examinations without the aid of the roentgen examination. Cohen,3 working in our laboratory, analyzed 221 cases of patients suffering from brain tumors who had been referred to us by the neurologic and neurosurgical divisions of the University Hospital for roentgen examinations of the head. The tumors of these patients were distributed as follows: Ninety-seven in

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