What is the role of the square wrist sign in the evaluation of carpal tunnel syndrome (CTS)?

Updated: Mar 30, 2020
  • Author: Nigel L Ashworth, MBChB, MSc, FRCPC; Chief Editor: Milton J Klein, DO, MBA  more...
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The square wrist sign

  • The ratio of the wrist thickness to the wrist width is greater than 0.7.

  • This test has a modest sensitivity/specificity of 70%.

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