The Agger Nasi cell and uncinate process, the keys to proper access to the nasolacrimal drainage system.

摘要: Background Profound knowledge of the surgical anatomy is required to perform any dacryo-cysto-rhinostomy (DCR) procedure. In endoscopic endonasal DCR surgery, uncinate process (UP) and/or agger nasi (AN) cell are frequently found obstruct access lacrimal fossa. The aim this study was analyse radiological UP and AN in relation sac. Methods Preoperative computed tomography (CT) scans patients undergoing other sinus surgeries were analysed regarding their anatomical variations concerning at level common canaliculus. covering fossa by graded a surgically relevant sought after. Results CT datasets 60 sides included. Analysis showed an overlying upper parts sac 55% patients. An anteriorly attaching least 50% 63% individuals. Conclusion more than 80% all presented with either very attached or that would have be removed effective DCR. need included concept.