Lateral Cutaneous Nerve of the Thigh, Medial View

Description

Arising from the lumbar plexus, the lateral cutaneous nerve of the thigh (lateral femoral cutaneous nerve, L2 to L3) tracks inferiorly across the iliacus toward the anterior superior iliac spine, then courses deep to the inguinal ligament into the proximal thigh. A medial, side-on perspective places the ilium and acetabular region superior and proximal to the femur, while the nerve’s cutaneous distribution lies anterolateral to the hip and along the lateral thigh. The femoral shaft descends distally to the knee joint with the patella anterior, continuing to the tibia and fibula, with the tarsals and metatarsals shown in the foot. Yellow peripheral nerve pathways contrast against the bony landmarks. Meralgia paresthetica is the clinical anchor for this nerve. Entrapment most often occurs as the nerve passes under or through the inguinal ligament near the anterior superior iliac spine, producing burning dysesthesia and numbness over the anterolateral thigh without motor weakness, a pattern that helps separate it from femoral neuropathy or L2 to L3 radiculopathy. This angle also helps clarify common iatrogenic mechanisms, including compression from tight belts and retractor-related injury during anterior approaches to the hip, pelvic surgery, or iliac crest bone graft harvest. Use this asset for teaching lumbar plexus branching and anterior pelvic wall relationships in gross anatomy, physical therapy neuroanatomy, and regional anesthesia modules that cover sensory-only neuropathies. It also fits well in clinical handouts and textbooks discussing meralgia paresthetica, landmark-based injection sites, and surgical risk counseling for anterior hip and pelvic procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.