Posted by Chris Faubel, MD
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Courtesy the 'Mayo Foundation'
Meralgia paresthetica is a mononeuropathy of the lateral femoral cutaneous nerve (LFCN), most commonly caused by entrapment as it passes underneath the inguinal ligament.
Lateral femoral cutaneous nerve
- Pure sensory nerve
- Formed by the ventral rami of the L2 and L3 nerve roots
- Runs in the retroperitoneal space along the lateral border of the iliacus muscle, and then passes under the lateral aspect of the inguinal ligament about 1-cm medial to the anterior superior iliac spine (ASIS).
- Supplies sensation to the anterolateral thigh (more lateral than anterior) – see image
- ICD-9 code: 355.1 “meralgia paresthetica”
- ICD-10 code: G57.1 “meralgia paresthetica” (lateral cutaneous nerve of thigh syndrome)
History
