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  • Title: Facial nerve neuromas: CT findings.
    Author: Inoue Y, Tabuchi T, Hakuba A, Fukuda T, Nakao T, Nemoto Y, Saiwai S, Miyamoto T, Sato S, Ogata M.
    Journal: J Comput Assist Tomogr; 1987; 11(6):942-7. PubMed ID: 3500193.
    Abstract:
    Although neuromas of the facial nerve are rare, they present with uniform clinical and radiological findings. Their pluridirectional tomography findings have been well described; however, the appearance of the intracranial extension of the neuroma which is best visualized by CT has not been emphasized. We report five cases of facial nerve neuromas with particular attention to their intracranial extension. For comparative purposes we also have reviewed 10 cases of acoustic and eight cases of trigeminal neuromas, all involving the cerebellopontine angle (CPA) and the middle cranial fossa. Two of the five facial nerve neuromas affected the second and third segments of the facial canal, and three involved both the CPA and the middle cranial fossa spreading across the midpetrosal bone. This type of tumor extension seems to be characteristic of facial nerve neuromas. In acoustic and trigeminal neuromas the tumor crossing toward the middle fossa takes place via the tentorial hiatus (acoustic) and the petrous apex (trigeminal).
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