Case Report

Rapid Destruction of the Humeral Head Caused by Subchondral Insufficiency Fracture: A Report of Two Cases

Figure 1

Case  1. Serial preoperative radiographs. (a) At the first visit, the humeral head shows a minor collapse. (b) Three weeks later, the collapse of the humeral head has progressed. (c) Four months later, the destruction of the shoulder is further progressed, including the glenoid.