Final answer:
A fracture of the femur is rare in the pediatric population but is a significant source of morbidity and mortality, leading to complications such as deep vein thrombosis, pulmonary embolism, and pneumonia.
Step-by-step explanation:
A fracture of the femur is rare and is a major source of morbidity and mortality in the pediatric population. Femoral fractures can lead to significant health issues due to the potential complications that arise from the immobility they cause. These complications can include deep vein thrombosis, pulmonary embolism, and pneumonia, especially in elderly individuals who may already have weakened bones due to conditions such as osteoporosis. A hip fracture, which is often a fracture of the femoral neck, usually requires immediate surgery, followed by a significant period of mobility assistance and potentially prolonged bed rest, which in turn can lead to additional severe health risks.