Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
a) Radiological and b) schematic views of young patients with hip pain due to acetabular retroversion (left) and hip dysplasia (right). b) Three radiological signs of acetabular retroversion are shown (positive ischial spine sign, posterior wall sign and crossover sign with retroversion index of >50%) . AI, acetabular index; LCE, lateral-centre edge.
