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The cadaver of a Caucasian man with a supernumerary fourth dorsal interosseous muscle in the right hand: a case report

Konstantinos Natsis1*, George Tsakotos1, Konstantinos Vlasis1 and Juergen Koebke2

Author Affiliations

1 Department of Anatomy, Medical School, Aristotle University of Thessaloniki, P.O. Box: 300, Postal Code: 54124, Thessaloniki, Greece

2 Center of Anatomy, Medical School, University of Cologne, Gebäude 35, Joseph-Stelzmann Str. 9, D-50931 Köln, Germany

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Journal of Medical Case Reports 2011, 5:393  doi:10.1186/1752-1947-5-393

Published: 18 August 2011



The human hand is a complex anatomic entity consisting of many muscles, nerves, and vessels, thus providing a special ability to perform accurate and meticulous movements. In this group of muscles are the four dorsal interosseous muscles.

Case presentation

A distinct supernumerary fourth dorsal interosseous muscle was found in the right hand of the cadaver of a 76-year-old Caucasian man without any other concomitant abnormality.


The presence of such an additional muscle in the hand should be considered in the management of hand deformities, whether the treatment is conservative or surgical.