Final answer:
An X-ray study of the femur should be ordered for a 14-year-old boy with a bony deformity of the thigh.
Step-by-step explanation:
An X-ray study of the femur should be ordered for a 14-year-old boy with an obvious bony deformity of the thigh. The femur is the single bone of the thigh region and is the longest and strongest bone in the body. It accounts for approximately one-quarter of a person's total height and is responsible for transmitting the weight of the body from the hip to the knee.