Sinonasal anatomy. In this coronal plane CT scan, several key sinonasal landmarks can be seen. M, maxillary sinus; IT, inferior turbinate; MT, middle turbinate; im, inferior meatus; mm, middle meatus; arrowhead indicates nasal septum. Source: Otolaryngology: Head & Neck Surgery, CURRENT Diagnosis & Treatment: Surgery, 14e Citation: Doherty GM. CURRENT Diagnosis & Treatment: Surgery, 14e; 2015 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1202/doh_ch15_f003.png&sec=71517764&BookID=1202&ChapterSecID=71517698&imagename= Accessed: October 10, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved