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contentuptodate· Content· item f28_40_29327

©2013 UpToDate ® Print Email Boutonniere deformity Tendon avulsion injuries. The top figure shows the pointer finger being struck by a ball which led to avulsion at the proximal interphalangeal joint (boutonniere deformity), anatomically depicted in the lower figure. Reproduced with permission from: Anatomical Chart Company. Copyright © 2008 Lippincott Williams & Wilkins.