Fig. 13.3 Grayscale ultrasound using Esaote Mylab 25 system. Palmer transverse view at the
proximal inlet of the carpal tunnel, showing ( highlighted by the cursors): ( a ) Normal elliptical
median nerve. ( b ) Median nerve swelling manifested by increased median nerve cross section area.
( c ) Flattening of the median nerve, which appears in late stages of median nerve compression. MN:
median nerve; Flex Tendons: Flexor tendons
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