Subtrochanteric Fractures as Complication of Osteosynthesis of Femoral Neck Fractures with Cannulated Cancellous Screws

Abstract

Internal fixation by use of cannulated cancellous screws is a common orthopaedic procedure. However, screw holes through the lateral cortex of the femur cause reduction of the strength of the bone. We studied 2 patients who sustained subtrochanteric fracture at the level of the distal screw after the osteosynthesis of femoral neck fractures with cannulated cancellous screws. Their aetiology, prevention, and management are discussed. It is recommended that CCS should be inserted as far as possible from another screw. If subtrochanteric fracture occurs, removal of CCS and osteosynthesis with ENDER nails is advised.