Which listing is associated with raising the femur head on radiographs after correction?

• A. AS
• B. IN
• C. PI
• D. ASIN

Answer: (C)

Understanding pelvic listings on radiographs: when the innominate (the pelvic bone) is rotated posteriorly, it tends to alter how the femoral head sits in the acetabulum on an AP view. After an adjustment intended to correct the posterior rotation and bring the pelvis toward a neutral position, the femoral head on that side often rises on the radiograph. That observable rise in the femur head after correction matches the posterior innominate (PI) listing, making it the best choice. Other patterns would show different directional changes in femoral head height after correction, so they don’t align with the described sign.