PMC5804647_01
Ultrasound transverse view of the patient's wrist. a Left wrist (the palm of which suffered from numbness and tingling). b Right wrist. Dashed circles indicate the median nerves. The figure shows enlargement of the left median nerve compared to the right median nerve
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Fig1
Ultrasound examination revealed no hematomas and a normal appearance of the radial artery and radial nerve, but an enlargement of the left median nerve compared with the right median nerve at the pisiform bone level was observed (cross section areas of the left and right median nerves were 12 and 9 mm2, respectively) (Fig. 1).
Magnetic resonance imaging of the left wrist. The red circle indicates the left median nerve. Magnetic resonance imaging shows swelling of the left median nerve and no hematoma
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Fig2
T2-weighted MRI (Fig. 2). There was no thickening of the flexor tendon, but there was fluid stagnation in the deep part of the bursa and intense signals around the flexor tendon; these are typical findings in carpal tunnel syndrome even though the patient has no past medical history of carpal tunnel syndrome.