Kier El

The role of high resolution computed tomography in evaluating disease of the middle ear.

Successful temporal bone imaging demands appropriate modifications of the computed tomography (CT) scanner. While CT has been shown to be useful for demonstrating the detailed anatomy of the temporal bone, its role in the evaluation of middle ear pathology has not been investigated. Selective cases are presented to highlight the advantages of CT. Computed tomography is excellent in demonstrating soft tissue masses in the middle ear in inflammatory disease. It is also useful in accurately localizing bony fragments in trauma, as well as determining the status of the ossicles. Disease solely involving the tympanic membrane can be diagnosed on CT without subjecting the patient to surgical exploration.

High resolution computed tomography of the osseous external auditory canal: 1. Normal anatomy.

This study of 34 normal ears was conducted in order to define more precisely the normal computed tomographic (CT) anatomy of the osseous external auditory canal. Great variability was found in canal configuration and its relationship to the temporal squama. The understanding of normal CT appearance of the various fissures along the anterior wall of the external canal is important to avoid mistaking fissures for fractures.

CT findings in a nasopharyngeal extramedullary plasmacytoma.

We report a case of an extramedullary plasmacytoma arising from the nasopharynx. The computed tomographic appearance of this rare tumor is discussed.

High resolution computed tomography of the osseous external auditory canal: 2. Pathology.

High resolution computed tomography (CT) was used to evaluate disease involving the external auditory canal in 18 patients. Most patients also received pluridirectional tomography. The advantages and pitfalls of CT are discussed.