The lateral femoral cutaneous (LFC) nerve emerges from the lateral margin of the psoas major and runs across the anterior surface of the iliacus below the iliacus fascia
Just medial to the anterior superior iliac spine (ASIS) the LFC nerve runs underneath the inguinal ligament, pierces the iliac fascia and runs obliquely across the sartorius muscle from medial to lateral sandwiched between the sartorius muscle fascia and the fascia lata
Approximately 2-3 cm below the ASIS, the LFC nerve pierces the fascia lata, splits in two branches and innervates the lateral thigh from the greater trochanter to the knee (see next page)
Lateral femoral cutaneous nerve (yellow), anterior and posterior branches (red and cyan arrows), anterior superior iliac spine (blue arrow), sartorius (pink), psoas major (red asterix), iliacus (green asterix), quadratus lumborum (blue asterix), transverse abdominis (cyan asterix)
