Bisphosphonates-induced Atypical Subtrochanteric Fracture Femur: A Case Report.

A 71-year-old female came to our institute with a subtrochanteric left femur fracture following a fall from her bed. It was a low-energy trauma, and the X-rays were suggestive of an atypical fracture following bisphosphonate therapy for five years. The fracture was fixed with intramedullary nailing following which she was started on partial weight-bearing walking after three weeks. The fracture went on to a nonunion; after one year, the fracture site was opened and bone grafting with bone marrow injection, along with augmented plating, was done. The fracture showed signs of union three months postoperatively. Fractures associated with bisphosphonate therapy may be associated with delayed union or nonunion and should be explained to the patient.