Hard corn in a typical location on the dorsum of the fifth digit Hard corn in a typical location on the dorsum of the fifth digit. (Courtesy of Richard P. Usatine, MD.) Source: Chapter 207. Corn and Callus, The Color Atlas of Family Medicine, 2e Citation: Usatine RP, Smith MA, Chumley HS, Mayeaux EJ, Jr.. The Color Atlas of Family Medicine, 2e; 2013 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/usat2/usat2_c207f006.png&sec=45372006&BookID=685&ChapterSecID=45361282&imagename= Accessed: December 15, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved