[Incomplete section of a superficial flexor tendon in zone II: successive complications and quadriga syndrome]

Partial section of the flexor tendon may be asymptomatic and heal without sequelae. However, in the absence of primary treatment, they may lead to subsequent complications such as: tendon locking due to incarceration of a partially detached slip of tendon, jump phenomena due to irregularity of the surface or the volume of the tendon, which induces a sudden jerk as the tendon passe through the retinaculum, and lastly, secondary tendon rupture. These complications all occurred in the case reported here, who also presented with syndrome of the quadriga. Locking of the intact deep flexor tendon by the ruptured superficial tendon interfered with the movements of the other fingers. Resection of the ruptured tendon was able to restore complete function. Opinions diverge concerning the need to suture partial sections of the flexor tendons, but the authors agree on the great importance of meticulous surgical exploration and immediate controlled mobilisation, which ensures the best functional results.