[Migration of Kirschner wires after surgical stabilization of injuries in the area of the shoulder--4 case reports].

Internal fixation is recommended for displaced and unstable fractures of the lateral clavicle and fractures involving the proximal humerus. Kirschner wires, although recommended in the orthopedic literature bear the risk of wire breakage and migration. 4 cases with serious and potentially hazardous complications are presented. All reported complications occurred years after the operative treatment without clinical symptoms. Regular postoperative follow-ups and early hardware removal after fracture healing is recommended.