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The recurrent meningitis associated with spontaneous CSF rhinorrhea in a 4-year-old boy was found to be due to simultaneous congenital defects. There was a dehiscence of the anterior fossa associated with congenital changes in the temporal bone, the petrous bone and the stapes. All these defects were visible including demineralization of the footplate stapes region. The high-resolution X-ray CT served as a clear guide to the surgeon.
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