(A) Scar of old laceration injury is located on the anterior surface of her left wrist just proximal to the proximal wrist crease. (B) Median motor nerve inching technique recorded at left abductor pollicis brevis muscle showed abrupt onset latency change(0.9 ms) between -2 and -3cm distal to the wrist crease(red ellipse). (C) Median sensory nerve inching technique recorded at left 4^th finger showed no abrupt(≥0.3 ms) onset latency change during serial incremental stimulation. (D) Ultrasonogram. Transverse view at the palmar carpal ligament level. Scar tissue invaded fascicles of left median nerve especially at the ulnar side (white arrows) but in the radial side, fascicular architecture of median nerve is preserved (arrow heads). (E) Longitudinal view of left median nerve. No obvious median nerve compression is observed below the transverse carpal ligament (white arrows). MN; median nerve, TCR; transverse carpal ligament.