Fig. 1

Left: photograph of the patient’s head showing the intramuscular septum between the anterior third and the posterior two-thirds of the gluteus medius (green arrow), and delimitation of the anterior border (white arrow). Right: drawing of the separation of the two parts of the muscle, with the formation of an anterior flap that includes the anterior third of the gluteus medius and the anterior half of the gluteus minimus, joined to the anterior portion of the tensor fasciae latae by the conjoint tendon, which is detached from the femur. The drawing is taken from the Atlante di Chirurgia Ortopedica (Orthopedic Surgery Atlas), edited by F. Pipino and published by Gerni Editore as a special edition (color figure online)