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Non-traumatic CSF fistulae: clinical history and management.

Non-traumatic 'spontaneous' CSF fistulae are uncommon. The clinical features of 23 patients treated for non-traumatic CSF fistulae are presented. Twenty of these patients had normal CSF pressure and six developed meningitis. Surgical repair of these fistulae is recommended in order to reduce the risk of meningitis. For this their localization is essential.