Figure 13: Calcific tendinopathy of the hip. (a) Gluteus medius/minimus calcific tendinopathy (arrow head) is best appreciated on AP hip or pelvis radiographs. (b) Rectus femoris calcific tendinopathy most commonly presents lateral to the acetabular weight-bearing surface (solid arrow). (c) and (d) Calcific tendinopathy of the gluteus maximus tendon. The gluteus maximus tendon calcification almost always involves the tendon insertion on the gluteal tubercle along the posterolateral subtrochanteric femur (black arrow). Cortical erosion and periosteal reaction are frequently seen (dashed arrow), which can easily be mistaken for a juxtacortical malignancy.