Neurilemoma of the facial nerve in the parotid gland

DOI 6 Citations 26 References
  • Iwai Hiroshi
    Department of Otorhinolaryngology, Rakusai New Town Hospital, Kanasai Medical University Department of Otorhinolaryngology, Kanasai Medical University
  • Omae Mariko
    Department of Otorhinolaryngology, Kanasai Medical University
  • Ikeda Koshi
    Department of Radiology, Kanasai Medical University
  • Baba Susumu
    Department of Otorhinolaryngology, Kanasai Medical University
  • Waka Nobuhiko
    Department of Otorhinolaryngology, Rakusai New Town Hospital, Kanasai Medical University
  • Shimizu Ken
    Department of Radiology, Osaka Red Cross Hospital
  • Yamashita Toshio
    Department of Otorhinolaryngology, Kanasai Medical University

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Other Title
  • 耳下腺内顔面神経鞘腫の検討

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Abstract

Seven cases of intraparotid facial neurilemoma were reported. Magnetic resonance (MR) findings including tumor extension to the stylomastoid foramen, target sign and multicentricity as well as frozen section diagnosis were effective tools for diagnosis while aspiration biopsy cytology was not helpful in preoperative appraisal. Tumor extension to the stylomastoid foramen in MR imaging was a sign of preoperative facial nerve palsy. Comparison of histopathological findings with MR findings indicated that differences in local cell growth of the tumor causes target sign in MR imaging. Because intraparotid neurilemomas are often misdiagnosed as pleomorphic adenoma which shows tumor recurrence after scattering of the tumor cells in the surgical field, preservation of tumor capsules with the facial nerve accompanied by tumor rupture may be preserved in the surgery only when the diagnosis of neurilemoma is confirmed.

Journal

  • Stomato-pharyngology

    Stomato-pharyngology 16 (3), 337-343, 2004

    Japan Society of Stomato-pharyngology

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