“…The anterior superior iliac spine (ASIS), anterior inferior iliac spine (AIIS), iliac tubercle, and posterior superior iliac spine (PSIS) are important surface markers for evaluating the position of the iliac crest [ 18 , 19 ]. Many soft tissues, such as the sartorius, tensor fascia lata, superficial layer iliaotibial band, gluteal aponeurotic fascia, inter- and external oblique muscles, transversus abdominis, and iliac muscle, are attached to the iliac crest [ 19 , 20 ]. In addition, there are many major nerves and arteries around the iliac crest, including the lateral femoral cutaneous nerve, ilio-inguinal nerve, ilio-hypogastric nerve, subcostalis nerve, ilio-lumbar artery, deep circumflex iliac artery, fourth lumbar artery, and superior gluteal artery [ 21 – 23 ].…”