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Compression and Stretching of the Brachial Plexus in Thoracic Outlet Syndrome: Correlation Between Neuroradiographic Findings and Symptoms and Signs Produced by Provocation Manoeuvres

In3vestigation performed at the Department of Orthopaedic Surgery, Kumamoto University School of Medicine, Kumamoto, Japan, From the Department of Orthopaedic Surgery, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto, 860-8556, Japan, Kataoka Orthopaedic & Anesthetic Clinic, Japan, Kumamoto Rehabilitation Hospital, Japan and Kumamoto Orthopaedic Hospital, Japan

Correspondence: Dr Junji Ide, M.D. Department of Orthopaedic Surgery, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto, 860-8556, Japan. Tel.: +81-96-373-5226; fax: +81-96-373-5228; E-mail: ide{at}kaiju.medic.kumamoto-u.ac.jp.

In order to investigate the mechanism of nerve irritation in thoracic outlet syndrome (TOS), we studied 150 patients who presented with symptoms of neurologic TOS between 1985 and 1999. They first performed various provocative physical manoeuvres and then underwent injection of contrast medium into the supraclavicular part of the brachial plexus. Several of the provocative manoeuvres were then repeated and radiographs were again obtained. Based on the neuroradiographs, we identified three subsets of patients; those with only compression (type 1 TOS, n=27, 18%), those with combined compression and stretching (type 2 TOS, n=111, 74%), and those with only stretching (type 3 TOS, n=12, 8%). We were able to correlate the neuroradiological subsets with symptoms elicited by pre-radiographic provocative manoeuvres; in 92 patients (61%) these were elicited by traction manoeuvres. We conclude that stretching is an important factor of nerve irritation in TOS.

Journal of Hand Surgery (British and European Volume), Vol. 28, No. 3, 218-223 (2003)
DOI: 10.1016/S0266-7681(03)00010-X


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