Bilateral atypical femoral fractures after long-term alendronate therapy: a case report.

Bisphosphonates therapy has been shown to decrease the risk of vertebral, non-vertebral, and hip fractures in postmenopausal women. However the long-term safety of bisphosphonates use has been questioned. Recent reports have demonstrated the association between long-term alendronate therapy with low-energy subtrochanteric fracture or diaphyseal femoral fractures in a small number of patients. The author reported the first case of bilateral atypical femoral fractures in postmenopausal women with osteoporosis receiving long-term alendronate therapy.