Three-dimensional image analysis of the temporal bone in patients with unilateral attic cholesteatoma

Li Tai Tsai*, C. Y. Wang, Y. C. Lo, C. D. Lin, M. H. Tsai

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

8 Scopus citations

Abstract

We determined temporal bone anatomy in patients with unilateral attic cholesteatoma. We compared the affected and normal ears of ten patients with unilateral attic cholesteatoma using three-dimensionally reconstructed high-resolution computed tomography images of the temporal bone. We determined the eustachian tube angle, eustachian tube length, sizes of the tympanic orifice of the eustachian tube, the pars flaccida, and the mastoid cavity, and distances of the pars flaccida and the tympanic orifice of the eustachian tube from the epitympanic roof. No significant differences were found between the normal and affected ears with regard to the size of the eustachian tube orifice, eustachian tube length or distances of the pars flaccida and the tympanic orifice of the eustachian tube from the epitympanic roof. By contrast, the mastoid cavity and the eustachian tube angle were significantly larger in the normal ears than in the affected ears [mean, 6.99 cm3 (S.D.,4.9 cm3) vs. 1.28 cm3 (0.81 cm3) and 16.7° (4.12°) vs. 13.89° (5.30°), respectively]. The pars flaccida was significantly smaller in the normal ears [1.07 cm (0.31 cm)] than in the affected ears [2.19 cm (0.77 cm)]. The inherent anatomy of the eustachian tube may be particularly important in the formation of attic cholesteatomas.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalNeuroradiology Journal
Volume23
Issue number3
DOIs
StatePublished - 06 2010
Externally publishedYes

Keywords

  • Attic cholesteatoma
  • Eustachian tube
  • Mastoid
  • Temporal bone
  • Three-dimensional image

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