There is hyperintensity along the surface of the humerus (arrow) due to subperiosteal hemorrhage. The marrow signal is normal. Edema is present within and adjacent to at least 3 injured ribs on the right (arrows). There is hyperintense callous in a left lower rib (arrow). Source: Musculoskeletal Trauma, Diagnostic Imaging of Infants and Children Citation: Wells RG. Diagnostic Imaging of Infants and Children; 2015 Available at: http://accesspediatrics.mhmedical.com/DownloadImage.aspx?image=/data/books/1429/well_ch65_f116.png&sec=84708559&BookID=1429&ChapterSecID=84708327&imagename= Accessed: November 11, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved