(a)
(b)
Figure 2: Intraoperative findings. (a) Rupture of the flexor digitorum profundus of the index finger (black arrowhead). Degeneration of the flexor digitorum superficialis of the index finger (white arrowhead). (b) A pinhole-sized perforation of the distal radioulnar joint capsule (white arrowhead). The bony spur covered with a joint capsule (black arrowhead).