Useful MRI assessment for bowstringing of the flexor tendon after trigger finger release

Bowstringing of the flexor tendon because of inadvertent disruption of the A2 pulley has been routinely described as a complication after the release of trigger fingers. In this report, we present two cases of bowstringing of the flexor tendon after release of trigger fingers. In both cases, magnetic resonance imaging (MRI) with the finger in flexion was useful for definitive diagnosis, and reconstruction of the A2 pulley by the double loop technique using the palmaris longus (PL) tendon resulted in satisfactory outcome.