Meralgia paresthetica (MP) is a mononeuropathy of the lateral femoral cutaneous nerve (LFCN), characterized by symptoms of pain, numbness, itching, and paraesthesia of the lateral thigh. Other potential causes of lateral thigh pain and sensory disturbance include upper lumbar nerve root compression (at L1-L3 vertebral levels), femoral neuropathy, and trochanteric bursitis. Common causes of MP include mechanical pressure exerted on the LFCN, including prone positioning during surgery, obesity (body mass index [calculated as weight in kilograms divided by height in meters squared] >30), pregnancy, and the wearing of tight clothing, military uniforms, or lumbar braces. This condition may also be caused by compression of the LFCN at the level of the inguinal ligament, and there are rare reports of MP after compression below the level of the inguinal ligament.1
Triplett JD, Robertson A, Yiannikas C. Compressive Lateral Femoral Cutaneous Neuropathy Secondary to Sartorius Muscle Fibrosis. JAMA Neurol. Published online October 08, 2018. doi:10.1001/jamaneurol.2018.2955
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