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Smooth muscle choristoma of the internal auditory meatus

  • Otology
  • Published:
European Archives of Oto-Rhino-Laryngology and Head & Neck Aims and scope Submit manuscript

Abstract

Choristomas of the internal auditory meatus are very uncommon tumors. Because of their rarity and the lack of a consistent clinical and radiological pattern, they are usually misdiagnosed as vestibular schwannomas. Surgical exploration usually shows involvement of the vestibular, cochlear or facial nerve by the tumor, representing a diagnostic and therapeutic challenge to the surgeon. In this report, a case of a smooth muscle choristoma of the internal auditory meatus is presented. The lesion involved the vestibular and cochlear nerves and was extremely adherent to the facial nerve. Microscopic examination of the tumor revealed nerve fibers, smooth muscle and a small amount of adipose tissue. No striated muscle was found. The contemporary terminology, diagnosis and management of this infrequent lesion are analyzed.

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Authors and Affiliations

  1. Department of Otolaryngology, La Paz University Hospital, Po. de la Castellana 261, 28046, Madrid, Spain

    Luis Lassaletta & Javier Gavilán

  2. Department of Otolaryngology, Hospital de Puertollano, Ciudad Real, Spain

    Jose Granell

  3. Department of Pathology, “La Paz” University Hospital, Madrid, Spain

    Mercedes Patrón

Authors
  1. Luis Lassaletta
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  2. Jose Granell
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  3. Mercedes Patrón
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  4. Javier Gavilán
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Correspondence to Luis Lassaletta.

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Lassaletta, L., Granell, J., Patrón, M. et al. Smooth muscle choristoma of the internal auditory meatus. Eur Arch Otorhinolaryngol 262, 834–838 (2005). https://doi.org/10.1007/s00405-004-0881-2

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  • DOI: https://doi.org/10.1007/s00405-004-0881-2

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