Subtrochanteric Femur Fracture: Pathogenesis and clinical findings

 • Subtrochanteric region spans 5 cm distally from the lesser trochanter

 • Major traumas is most common in young and low energy fall fractures in elderly

Causes: 

 • Major trauma -> An excess amount of force is transferred to the femur ( e.g. fall from height in elderly, motor vehicle accident in young people)

 • Osteoporosis -> Low energy forces exerted onto the lateral side of the weakened femur (e. g. low level fall)

 • Atypical femur fracture -> Bisphosphonate suppresses bone remodeling -> Microscopic damage weakens the bone



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