Fig. 6.

The representative case of the hip of AD with coexisting FAI-related findings. This case was 50 years old women, left hip was defined as a hip of borderline AD with coexisting cam deformity. (A) CE angle, Sharp angle and AI was 21°, 44° and 20°, respectively. (B) The acetabular version angle was 7° at a slice at the level of the superior margin of the femoral head (slice A1). (C) The α-angle and HNOR at a slice of R4 (1:30 o’clock) was 57° and 0.125, respectively. HP was also positive. (D) PGD was negative. According to the CE and Sharp angle, this hip was defined as a borderline AD. On the other hand, this hip was also defined as a cam deformity due to α-angle > 55°, HNOR < 0.13 and HP positive. However, this hip did not coexist with a pincer deformity, because the AI was over 0° and acetabular version angle was not negative.