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Acetabular angle - diagram

Case contributed by Dr Frank Gaillard
Modality: Diagram

Case Discussion:

The acetabular angle is a plain film measurement used when evaluating developmental dysplasia of the hip (DDH) which  is measured between Hilgenreiner's line and a line parallel to the acetabular roof. At birth it should be less than 28 degrees, and should progressively reduce with maturation of the hip.

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