Chiasmatic Ridge: Incidence, Classification, and Clinical Implications

pa.ythelady61 shared this article with you from Inoreader Chiasmatic Ridge: Incidence, Classification, and Clinical Implications Via Journal of Craniofacial Surgery - Published Ahead-of-Print Objective: The study aimed to identify the chiasmatic ridge (CR) morphology and to discuss its surgical significance. Methods: The suprasellar region of 90 adult dry skulls with unknown ages, sexes, or nationalities was examined to record the shape and incidence of the CR. Results: The CR was found in 14 (15.56%) of 90 dry skulls. The ridge was classified into 3 types, taking into account its shape, incidence (presence/absence), and the risk of residual tumor formation. The absence of the CR was named as Type 1 (76 cases, 84.44%). The bony extension without a hidden area was identified as Type 2 (8 cases, 8.89%), while the bony extension with a hidden area as Type 3 (6 cases, 6.67%). Conclusion: Type 3 CR (which has an evident hidden area beneath the ridge) should be taken into account by neurosurgeons to eliminate possible residual tumor risk during removal of tumors (eg, meningioma) with subfrontal or supraorbital approaches. Address correspondence and reprint requests to Orhan Beger, PhD, Department of Anatomy, Mersin University Faculty of Medicine, Ciftlikkoy Campus, 33343 Mersin, Turkey; E-mail: obeger@gmail.com Received 30 July, 2020 Accepted 28 October, 2020 This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. OB, IB: project development, data collection, data analysis, manuscript writing, manuscript editing. The authors report no conflicts of interest. © 2020 by Mutaz B. Habal, MD. View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.