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Advances in Orthopedics
Volume 2011, Article ID 321020, 3 pages
Case Report

Isolated Paralysis of the Adductor Pollicis: A Case Report

Department of Orthopaedic Surgery, University of Rome “Tor Vergata”, Viale Oxford 81, 00133 Rome, Italy

Received 22 September 2010; Revised 28 December 2010; Accepted 12 January 2011

Academic Editor: Amos Race

Copyright © 2011 F. De Maio et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report a case of isolated paralysis of the right adductor pollicis in a 30-year-old woman. Electromyographic study showed involvement of the deep motor branch of the ulnar nerve. A ganglion and an anomalous muscle were both ruled out clinically and by MRI as a possible cause of the paralysis. At surgical exploration, we found a fibrous band joining the pisiform and the hook of the hamate bone that compressed the deep motor branch of the ulnar nerve. The fibrous band was excised, and a neurolysis of the motor branch of the ulnar nerve was performed. At followup, eight months later, the patient had fully recovered strength of the adductor muscle.