J Korean Radiol Soc.
2000 Apr;42(4):609-616. 10.3348/jkrs.2000.42.4.609.
MR Imaging of the Orbital Apex: Anatomy and Pathology
- Affiliations
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- 1Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Korea.
- 2Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Korea.
- 3Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Korea.
- 4Department of Diagnostic Radiology, Asan Medical Center, University of Ulsan College of Medicine, Korea.
- KMID: 1945542
- DOI: http://doi.org/10.3348/jkrs.2000.42.4.609
Abstract
- The apex of the orbit is basically formed by the optic canal, the superior orbital fissure, and their contents. Space-occupying lesions in this area can result in clinical deficits caused by compression of the optic nerve or extraocular muscles. Evenvascular changes in the cavernous sinus can produce a direct mass effect and affect the orbitapex. When pathologic changes in this region is suspected, contrast-enhanced MR imaging with fat saturation is very useful. According to the anatomic regions from which the lesions arise, they can be classified as belonging to one of five groups; lesions of the optic nerve-sheath complex, of the conal and intraconal spaces, of the extraconal space and bony orbit, of the cavernous sinus or diffuse. The characteristic MR findings of various orbital lesions will be described in this paper.
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