A. Axial CT scan demonstrating an air-fluid level in the right frontal sinus with associated subgaleal abscess (arrow). B. Axial CT scan 8 weeks after subgaleal abscess treatment, now with erosion of the frontal table and complete opacification of the sinus (arrow). (Used with permission from Paul Krakovitz, MD.) Source: Complications of Sinusitis, The Color Atlas of Pediatrics Citation: Usatine RP, Sabella C, Smith M, Mayeaux EJ, Jr., Chumley HS, Appachi E. The Color Atlas of Pediatrics; 2015 Available at: http://accesspediatrics.mhmedical.com/DownloadImage.aspx?image=/data/books/1443/p9780071767019-ch027_f007.png&sec=94708315&BookID=1443&ChapterSecID=79839692&imagename= Accessed: November 15, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved