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Detection of posterior fossa tumours in adults by brain scanning.

SUMMARY 
 
A retrospective analysis of 6,300 adult brain scans between the years 1970–1975 was made with respect to posterior fossa tumours. 31 abnormal posterior fossa scans were noted with 1 false positive. In addition there were 13 false negative studies in that period. Correlation was made with tumour histology, tumour size and neuro-radiological procedures.