J Korean Radiol Soc.  1993 Oct;29(5):896-900.

A comparison of high resolution CT scan of temporal bone and operative findings in middle ear cholesteatoma

• Kweon TB
• Seong H
• Cheon MS
• Kim HJ
• Jang KJ
• Chun BH

Abstract

To evaluate the value of HRCT imaging in middle ear cholesteatoma, we prospectively analysed the CT images in 28 surgically proven cases with cholesteatomas regarding main site of lesion, ossicular change, facial nerve exposure and fistula formation . The most common main site of lesion was the epitympanum (92.8%). The results of sensitivity, positive predictability, and accuracy by CT imagings were as follows: for ossicular involvement, 94.1%, 88.8%, and 86.2% in malleus, 96.0%, 88.8%, and 85.7% in incus, 81.2%, 81.2%, and 78.5% in stapes; for facial verve exposure, 66.6%, 57.1%, and 81.2%; for fistula formation, 100%, 75.0%, and 96.4%, respectively. In conclusion, the temporal bone HRCT imaging is an accurate preoperative method in detecting main lesion site, ossicular involvement, fistula formation. Because of the low sensitivity and positive predictability in detecting facial nerve exposure, it is necessary to correlate the HRCT images with the clinical status.

MeSH Terms

Cholesteatoma
Cholesteatoma, Middle Ear*
Ear, Middle*
Facial Nerve
Fistula
Incus
Malleus
Methods
Prospective Studies
Stapes
Temporal Bone*
Tomography, X-Ray Computed*