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Absence of the Pronator Quadratus Muscle Precluding Distal Nerve Transfer
Christopher J Dy1, David M Brogan2, Berdale S Colorado2
1Department of Orthopaedic Surgery, Division of Hand and Upper Extremity Surgery, St. Louis, MO; Department of Surgery, Division of Public Health Sciences, Washington University School of Medicine, St. Louis, MO.
Abstract:
The branch of the anterior interosseous nerve to the pronator quadratus (PQ) is increasingly used as a donor nerve for end-to-end and reverse end-to-side nerve transfers. The anatomy of the PQ (and its nerve branch) is generally considered reliable in the absence of prior trauma. In this report, we describe a patient with an absent PQ despite intact clinical examination of other muscles supplied by the anterior interosseous nerve. The absence of the PQ precluded the use of its nerve as a donor nerve for transfer.
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