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Posterior fossa aneurysms simulating tumours
  1. W. F. Michael
  1. Department of Neurology, St. Bartholomew's Hospital, London
  2. The National Hospital, Queen Square, London


    Seven cases of aneurysm of the vertebral and basilar arteries, in which the clinical features suggested a diagnosis of posterior fossa tumour, are presented. Their clinical manifestations and the difficulties of diagnosis are discussed. These lesions may mimic cerebellopontine angle tumours or brain-stem gliomas, or, less commonly, the picture is one of a compressive lesion at the foramen magnum. The need for vertebral angiography is emphasized. Exploratory surgery carries a high risk, and is to be avoided.

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