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Skull base surgery. 1997 January; 7(1): 43–44.
PMCID: PMC1656611

Extradural Pneumatocele

An Unusual Cause of Pulsatile Tinnitus


Our objective is to heighten the awareness of the clinician to the unusual features of latrogenic, pulsatile, yet nonvascular tinnitus. We present the case of an elderly white male with pulsatile tinnitus immediately following microvascular trigeminal decompression. Computed tomography revealed an extradural air collection and mastoidal fistula. The patient noticed resolution of tinnius with digital pressure over the mastoidal operative site. Treatment included exposure of the aerocele with resection of the lateral wall, fistula obliteration with wax, and abdominal fat graft. The patient noted complete resolution of his tinnitus in the recovery room. The etiology of pulsatile tinnitus can be suspected based on history and can be confirmed with corroborative imaging techniques.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Morshed A, Mohit P. Cystic angiomatosis of the skull presenting with extradural pneumocephalus. Case report. J Neurosurg. 1990 Jun;72(6):968–970. [PubMed]
  • Canavan L, Osborn RE. Dural sinus air without head trauma or surgery: CT demonstration. J Comput Assist Tomogr. 1991 May-Jun;15(3):526–527. [PubMed]

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