The hip measurement described as the distance between the anatomical axis of the femur and the center of the femoral head is called what?

• A. Femoral Anteversion
• B. Femoral Offset
• C. Femoral Neck
• D. Greater Trochanter

Answer: (B)

Offset refers to the distance between the center of the femoral head and the anatomical axis of the femur. The measurement described—how far the head’s center sits from the shaft’s axis—is precisely femoral offset. This concept matters because it sets the hip abductors’ lever arm, influencing gait, joint forces, and stability, and it guides proper positioning in hip replacement. The other terms describe different ideas: angular orientation of the femoral neck (not a distance to the shaft axis), a part of the bone (the neck), or a bony prominence (the greater trochanter).