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. 2023 May 6;46(1):107. doi: 10.1007/s10143-023-02023-2

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Fig. 1 — Anatomical drawing of the course of the LFCN: The nerve originates from the nerve roots L2 and L3 runs posterior to the psoas muscle (PM) in the retroperitoneal space on top of the iliac muscle (IM) and exits the pelvis through the inguinal ligament (IL), just medial to the anterior superior iliac spine (ASIS), and in the upper leg runs on top of the sartorius muscles (SM). This anatomical drawing shows the type B variant, which is most frequently encountered in patients with idiopathic meralgia paresthetica [78]