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Fracture of the Sesamoid Bone of the Index FingerA Case Report
Karin L. Ljungquist, MD; Hisham Awan, MD
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Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

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The Hand and Upper Extremity Center, The Ohio State University, 915 Olentangy River Road, Suite 3200, Columbus, OH 43212. E-mail address for H. Awan: Hisham.Awan@osumc.edu
Investigation performed at the Hand and Upper Extremity Center, Department of Orthopaedics, The Ohio State University Medical Center, Columbus, Ohio

Copyright © 2012 by The Journal of Bone and Joint Surgery, Inc.
JBJS Case Connector, 2012 Mar 14;2(1):e9 1-3. doi: 10.2106/JBJS.CC.K.00043
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Extract

The average adult hand has five sesamoid bones: two at the metacarpophalangeal (MCP) joint of the thumb, one at the interphalangeal joint of the thumb, one at the radial side of the MCP joint of the index finger, and one at the ulnar side of the MCP joint of the little finger. To the best of our knowledge, fracture of the sesamoid bone of the thumb was first reported by Skillern in 19151. In the ninety-six years that have followed, we believe only twenty-one published reports of an additional thirty-six cases of fracture of the thumb sesamoid bones have been reported in the English-language literature215. This rare fracture is typically the result of a hyperextension injury to the MCP joint of the thumb and is most often managed conservatively with a short period of immobilization. Full recovery without residual pain is expected2,13,14.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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