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Figure 1: Ultrasonography (US) of the median nerves at the wrist. (a and b) The preoperative US showed a markedly increased cross-sectional area (CSA) of the median nerve at the wrist (right-29.6 mm2, left-36.0 mm2 at a maximal swollen point). (c and d) Follow-up US at 1 year after surgical decompression revealed a significantly reduced CSA (right-20.5 mm2, left-28.5 mm2 at a maximal swollen point)

Figure 1: Ultrasonography (US) of the median nerves at the wrist. (a and b) The preoperative US showed a markedly increased cross-sectional area (CSA) of the median nerve at the wrist (right-29.6 mm<sup>2</sup>, left-36.0 mm<sup>2</sup> at a maximal swollen point). (c and d) Follow-up US at 1 year after surgical decompression revealed a significantly reduced CSA (right-20.5 mm<sup>2</sup>, left-28.5 mm<sup>2</sup> at a maximal swollen point)