The crossover sign overestimates acetabular retroversion.

  title={The crossover sign overestimates acetabular retroversion.},
  author={Ira Zaltz and Bryan T. Kelly and Iftach Hetsroni and Asheesh Bedi},
  journal={Clinical orthopaedics and related research},
  volume={471 8},
BACKGROUND The crossover sign is a radiographic finding associated with cranial acetabular retroversion and has been associated with pincer-type femoroacetabular impingement (FAI) in patients with hip pain. Variable morphology, location, and size of the anterior inferior iliac spine (AIIS) may contribute to the crossover sign even in the absence of retroversion. Thus, the sign may overestimate the incidence of acetabular retroversion. QUESTIONS/PURPOSES We asked: Can the crossover sign appear… CONTINUE READING