The parts of the femur that are prone to fracture are mainly the femoral neck and the intertrochanteric space, as follows: First, the femoral neck. Fractures of the femoral neck occur mostly in middle-aged and elderly patients and are related to the decrease in bone quality due to osteoporosis. Fractures can occur when subjected to mild twisting and violence, mostly when the body twists and falls when walking and slipping, and indirect violence can also lead to femoral neck fractures. Secondly, intertrochanteric fracture is usually caused by indirect or direct violence, and can be caused by twisting the body during a fall, landing in an excessively abducted or adducted position, or landing laterally during a fall, or by direct impact of the trochanter. The intertrochanteric space is also one of the most common sites for cystic bone lesions and is therefore susceptible to pathologic fractures. In summary, the femoral neck and the intertrochanteric space are the common sites of fracture in the femur.