(A) This child dislocated the MCP joint of his thumb as a result of hyperextension force while falling on an outstretched hand. Gentle traction along with a good analgesic was used to put it back in place. MCP joint dislocation is sometimes seen in pediatrics, thumb MCP dislocation being the most common type. (B) A single anteroposterior view in a different child shows left thumb MCP joint dislocation. There are no fractures identified. (Photo/legend contributors: Mark Silverberg, MD/Rachelle Goldfisher, MD.) Source: Chapter 19. Orthopedics, Atlas of Pediatric Emergency Medicine, 2e Citation: Shah BR, Lucchesi M, Amodio J, Silverberg M. Atlas of Pediatric Emergency Medicine, 2e; 2013 Available at: https://accessemergencymedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/shah2/shah2_c019f052a.png&sec=42537256&BookID=577&ChapterSecID=42532505&imagename= Accessed: October 22, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved