Stress fractures of the femoral neck are uncommon injuries. In general, these injuries occur in 2 distinct populations, (1) young, active individuals with unaccustomed (不尋常的) strenuous activity or changes in activity, such as runners or endurance athletes, and (2) elderly individuals with osteoporosis. Elderly individuals may also sustain femoral neck stress fractures; however, hip fractures are much more common and are often devastating (毀滅性的) injuries.
emedicine.medscape.com
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