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Excerpt from Meralgia ParestheticaSynonyms, Key Words, and Related Terms: lateral femoral cutaneous mononeuropathy, entrapment of lateral femoral cutaneous nerve, paresthesias of upper lateral thigh area, numbness of upper lateral thigh area, meralgia paresthetica, obesity, contained iliopsoas hemorrhages, neoplasms in the retroperitoneal space, pregnancy, tight clothing Please click here to view the full topic text: Meralgia ParestheticaBackgroundA painful mononeuropathy of the lateral femoral cutaneous nerve (LFCN), meralgia paresthetica is commonly due to focal entrapment of this nerve as it passes through the inguinal ligament. Rarely, it has other etiologies such as direct trauma, stretch injury, or ischemia. It typically occurs in isolation. The clinical history and examination is usually sufficient for making the diagnosis. However, the diagnosis can be confirmed by nerve conduction studies. Treatment is usually supportive. The LFCN is responsible for the sensation of the anterolateral thigh. It is a purely sensory nerve and has no motor component. PathophysiologyReviewing the anatomy of the LFCN is essential for understanding the mechanism of its injury. The LFCN originates directly from the lumbar plexus and has root innervation from L2-3. The nerve runs through the pelvis along the lateral border of the psoas muscle to the lateral part of the inguinal ligament. Here, it passes to the thigh through a tunnel formed by the lateral attachment of the inguinal ligament and the anterior superior iliac spine. This is the most common site of entrapment. FrequencyUnited StatesThe exact frequency of meralgia paresthetica is unknown, but the condition is not rare. RaceNo racial predilection is known. SexNo gender proclivity is known. AgeLateral femoral cutaneous neuropathies have been reported in all age groups. Please click here to view the full topic text: Meralgia Paresthetica |
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