الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 289 |  |  |
| | | from | 289 | | |
Abstract
The aim of this work is to emphasize the role, value and impact of CT in detecting, evaluating and diagnosing chronic supportive otitis media, its complications as well as its role following operative interference.
from this study we conclude that:
1- otitis media remains a significant international health problem in terms of prevalence, economics, and squeal. The early detection and effective management may overcome or reduce the incidence of complications. The second and third decades are the commonest age group affected.
2- Ideally, the patients with chronic otitis media should be scanned in both axial and coronal planes as many relevant structures are best seen in only one of these planes. The use of single plane may lead to mistakes because structures parallel to the plane of the section are not visualized.
3- Detailed knowledge about the normal CT anatomy is essential for good interpretation of CT scan of the temporal bone.
4- CT is unique in its ability to display not only the internal bone architecture of the middle ear and mastoid but also is so sensitive to the presence of soft tissue disease that a negative scan effectively excludes the possibility of cholesteatoma.
5- CT scan is valuable in evaluating the complicated chronic suppurative otitis media without cholesteatoma in detecting the state of the ossicular chain and mastoid pneumatization, intratemporal complications or intracranial complications.
6- The pathogenesis of cholesteatoma has not been precisely defined, but the essential element is the presence of keratinizing stratified squamous epithelium in the middle ear and mastoid.
7- CT scan serves as a road map assist the surgeon cholesteatoma surgery.
8- There is no universally accepted surgical strategy for the management cholesteatoma. The extent of the cholesteatoma, the amount of preoperative destruction, and the size of the mastoid pneumatization guide the surgeon in choosing the type of operation for a particular ear.