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Radiographic characteristic of DDH and acetabular retroversion
| AP radiograph | False profile lateral radiograph | |
|---|---|---|
| DDH | LCEA < 20°, Tönnis angle > 10°, valgus femoral neck-shaft angle >135°, varus femoral neck-shaft angle <120°, extrusion index >25%, broken shenton line | ACEA < 20 |
| Acetabular retroversion | Crossover sign, ischial tuberosity prominence | NA |
LCEA, lateral center-edge angle; ACEA, anterior center-edge angle; NA, not applicable.
