Middle ear cholesteatoma extending into the petrous apex: Evaluation by CT and MR imaging

K. Ishii, S. Takahashi, K. Matsumoto, T. Kobayashi, Tadashi Ishibashi, K. Sakamoto, T. Soda

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

CT and MR imaging findings were reviewed in four cases of acquired cholesteatoma of the middle ear that extended medially into the petrous apex and middle cranial fossa. In one case the lesion further extended anteromedially into the sphenoid sinus. CT demonstrated the lesions as nonenhancing hypodense masses with bone destruction, extending medially from the middle ear cavity to the petrous apex region. On MR imaging, the lesion was slightly hypointense relative to brain on T1-weighted images and hyperintense on T2-weighted images. MR imaging clearly delineated the extraaxial location of the lesion and associated brain displacement. The medial extension of the cholesteatomas seems to have proceeded via a detour around the bony labyrinth into the petrous apex region by following normal pathways of temporal bone pneumatization.

Original languageEnglish
Pages (from-to)719-724
Number of pages6
JournalAmerican Journal of Neuroradiology
Volume12
Issue number4
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

Fingerprint Dive into the research topics of 'Middle ear cholesteatoma extending into the petrous apex: Evaluation by CT and MR imaging'. Together they form a unique fingerprint.

  • Cite this

    Ishii, K., Takahashi, S., Matsumoto, K., Kobayashi, T., Ishibashi, T., Sakamoto, K., & Soda, T. (1991). Middle ear cholesteatoma extending into the petrous apex: Evaluation by CT and MR imaging. American Journal of Neuroradiology, 12(4), 719-724.