Subchondral Insufficiency Fracture of the Femoral Head Caused by Excessive Lateralization of the Acetabular Rim

Figure 3

Plain radiographs at the last follow-up. (a) Anteroposterior X-ray obtained at the 2-year follow-up and (b) its enlarged image. Progression of the subchondral collapse was not observed but the acetabular overcoverage in both hips still remained (a dotted arrow indicates right and a white arrow indicates left side of the acetabular overcoverage).