Case report; the posttraumatic regeneration of the clavicle.

Fractures of the lateral part account for 25% of all the clavicle fractures. In rare cases, especially with late presentation, the highly osteogenic periosteal sleeve will form bone from the distal epiphysis towards the medial part of the clavicle. In patients with trapezius muscle involvement, we suggest excision of the regenerated limb with a subsequent lock-down procedure of the posterior located clavicle in the periosteal sleeve.