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Response to: ‘Paying attention to carpal tunnel contents lesions: ultrasound for evaluation of carpal tunnel syndrome’ by zhu and Liu
  1. Christian Dejaco1,
  2. Martin Stradner1,
  3. Dorothea Zauner1,
  4. Werner Seel2,
  5. Nicole Elisabeth Simmet2,
  6. Alexander Klammer1,
  7. Petra Heitzer2,
  8. Kerstin Brickmann1,
  9. Judith Gretler1,
  10. Florentine Fürst-Moazedi1,
  11. Rene Thonhofer1,3,
  12. Rusmir Husic1,
  13. Josef Hermann1,
  14. Winfried B Graninger1,
  15. Stefan Quasthoff2,4
  1. 1Department of Rheumatology and Immunology, Medical University Graz, Graz, Austria
  2. 2Department of Neurology, Medical University Graz, Graz, Austria
  3. 3Department of Internal Medicine, General hospital Muerzzuschlag, Muerzzuschlag, Austria
  4. 4Department of Neurology, General hospital of the Barmherzige Brüder Eggenberg, Graz, Austria
  1. Correspondence to Dr Christian Dejaco, Department of Rheumatology and Immunology, Medical University Graz, Auenbruggerplatz 15, Graz A-8036, Austria; christian.dejaco{at}gmx.net

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Our and several previous studies demonstrated a high diagnostic value of ultrasound for carpal tunnel syndrome (CTS).1 ,2 Among the various abnormalities within the carpal tunnel reported, the increase of the cross-sectional area (CSA) of the median nerve is the most commonly studied ultrasound abnormality.3 Additionally, ultrasound allows the identification of secondary causes of CTS, such as synovitis, tenosynovitis, calcified masses or tophaceous gout, as pointed out by zhu et al.4 We acknowledge that the diagnostic value of ultrasound is not perfect, as some patients may suffer from CTS despite a normal ultrasound result and, …

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