Fig. 3

Arthroscopic release of GMC using F and C method. a Represents the schematic outline of F (Black) and C (Red) method, where SP, IP, GT and ASIS represent superior portal, inferior portal, greater trochanter and anterior superior iliac spine, respectively. b, c, and d are intra-operative pictures showing the F release method, division is started from the centre of GT and continued up to the ASIS to divide iliotibial band, tensor fascia lata and gluteus maximus muscles. A yellow arrowhead in the picture d represents a healthy gluteal muscle. e is an intra-operative picture of the C release method to divide gluteus medius, gluteus minimus and deeper structures around GT