Petrous cephalocoele

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  • Incidental finding of a CSF filled structure in the petrous apex (blue arrow).
  • The cephalocoele was contiguous with Meckel's cave (red arrow).

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  • A 50-year-old patient presentd with right sided trigeminal neuralgia.
  • CT showed a well demarcated excavation of the right petrous apex.
  • The cavity was filled with CSF with no enhancement of diffusion restriction.

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  • A 60-year-old patient presented with headache.
  • CT showed a well-marginated lesion remodelling the right petrous apex.
  • MRI did not show any abnormal soft tissue or enhancement with only CSF signal content.