{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T23:37:20Z","timestamp":1790293040739,"version":"4.1.0"},"reference-count":36,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2014,11,20]],"date-time":"2014-11-20T00:00:00Z","timestamp":1416441600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int Forum Allergy Rhinol"],"published-print":{"date-parts":[[2015,3]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>Accidental injury of lamina papyracea (LP) remains one of the most common complications reported in endoscopic sinus surgery (ESS) even in most recent studies. The purpose of this study was to categorize the LP position radiologically and from an endoscopic perspective.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 207 computed tomography (CT) scans (414 sides) including both diseased and control groups were retrospectively reviewed by 2 examiners. Inferior turbinate attachment to the lateral nasal wall and the inferior margin of the planned middle meatal antrostomy (MMA) were identified anteriorly. Position of LP in relation to the vertical line passing through MMA inferior margin was reported. LP was categorized to lie either within 2\u00a0mm on either side of the MMA inferior margin (type I), more than 2\u00a0mm medial to the MMA line (type IIa: 2 to 4\u00a0mm; type IIb: &gt;4\u00a0mm), or more than 2\u00a0mm lateral to the MMA line (type IIIa: 2 to 4\u00a0mm; type IIIb: &gt;4\u00a0mm).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 221 sides in the control group, 69.7% were classified as type I, 24.9% as type II, and 5.5% as type III. Among the 193 diseased operated sides examined, 60.1% were classified as type I, 20.2% as type II, and 13.5% as type III. Weighted kappa coefficient showed good interexaminer reliability. Five sides (2.6%) in the case group had accidental LP penetration intraoperatively, 4 of them were type II and type III LP.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study improves surgeons\u2019 awareness of LP variations in the endoscopic field and can be of help for residents in training.<\/jats:p><\/jats:sec>","DOI":"10.1002\/alr.21450","type":"journal-article","created":{"date-parts":[[2014,11,20]],"date-time":"2014-11-20T18:26:21Z","timestamp":1416507981000},"page":"263-270","source":"Crossref","is-referenced-by-count":15,"title":["Variations of lamina papyracea position from the endoscopic view: a retrospective computed tomography analysis"],"prefix":"10.1002","volume":"5","author":[{"given":"Islam R.","family":"Herzallah","sequence":"first","affiliation":[{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Faculty of Medicine Zagazig University  Egypt"},{"name":"Ear Nose and Throat (ENT) Department King Abdullah Medical City 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