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Chiasmatic Ridge: Incidence, Classification, and Clinical Implications
1Department of Anatomy, Mersin University Faculty of Medicine, Mersin.
The chiasmatic ridge (CR) has three distinct morphologies. Type 3 CR, with a hidden area, requires neurosurgical attention to minimize residual tumor risk during specific surgical approaches.
Area of Science:
- Neurosurgery
- Anatomy
- Skull Morphology
Background:
- The suprasellar region is a critical anatomical area.
- Understanding bony landmarks is essential for surgical planning.
Purpose of the Study:
- To classify chiasmatic ridge (CR) morphology.
- To determine the surgical significance of CR variations.
Main Methods:
- Examination of 90 adult dry skulls.
- Recording the shape and incidence of the chiasmatic ridge.
Main Results:
- Chiasmatic ridge (CR) identified in 15.56% of skulls.
- Three CR types were classified: Type 1 (absence, 84.44%), Type 2 (no hidden area, 8.89%), Type 3 (hidden area, 6.67%).
Conclusions:
- Type 3 CR presents a potential risk for residual tumor.
- Neurosurgeons should consider Type 3 CR during subfrontal/supraorbital tumor removal to mitigate residual tumor risk.
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