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1 From the Department of Radiology, University of Florida College of Medicine, Gainesville, Florida
1. Ten surgically proven cases of posterior fossa neoplasms were examined by radioactive chlormerodrin brain scanning.
2. Three acoustic neurinomas were missed.
3. Six of 7 posterior fossa lesions were correctly localized.
4. A survey of the recent literature indicated that the accuracy of localization of acoustic neurinomas with radioactive chlormerodnin is about 40 per cent and all other posterior fossa tumors about 80 per cent, and that the latter figure is very nearly the same as the accuracy with which supratentorial tumors can be localized.
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