Comprehensive preoperative staging system for endoscopic app
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Juvenile nasal angiofibromas (JNA) is a benign lesion with high vascularity and the propensity of bone erosion leading to skull base invasion and intracranial extension. It is known to involve multiple compartments, which are often surgically difficult to access. With evolution in surgical expertise and technical innovations, endoscopic and endoscopic-assisted management has become the preferred choice of surgical management. Over the last four decades, various staging systems have been proposed, which are largely based on the extent of nasal angiofibroma. However, no clear guidelines exist for the stage-appropriate surgical management. In this study, we aim to formulate a novel staging system based on the analysis of high-quality preoperative imaging and propose detailed surgical guidelines related to disease stages as observed in 242 primary cases of JNA.

https://goo.gl/P8rT75
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