Bilateral "simultaneous" femoral neck fractures following minimal stress

Following jogging, a 53-year-old man experienced bilateral hip discomfort. Two weeks later, after stepping backward suddenly, he had severe pain in the right hip. Radiographs showed a displaced fracture of the right femoral head; this was pinned. Bone imaging revealed intense uptake in the other femoral head as well. This also was believed to be fractured, and therefore was repaired. During the two operations, no pathological cause of the bilateral femoral neck fractures was noted. The literature on simultaneous bilateral femoral neck fractures, without underlying bone disease, was reviewed.