[A case of neuralgic amyotrophy in the lower extremity (lumbosacral radiculoplexus neuropathy)].

[neuralgic amyotrophy]

We report a 76 -year -old man who suddenly had pain in the right buttock that radiated down the back of the leg . He underwent nerve block therapy , but subsequently noted weakness of the right leg . On examination , there was moderate weakness of the right gastrocnemius , flexor digitorum longus and extensor hallcis longus , and mild weakness of the tibialis anterior , quadriceps and hamstrings muscles . The right Achilles tendon reflex was absent . There was a slight diminution of touch sensation over the right L 5 -S 1 area . A nerve conduction study revealed reduced motor and sensory action potentials in the right leg . An electromyography showed evidence of denervation in the right gastrocnemius and tibialis anterior muscles . Treatment with corticosteroids was effective for alleviating his pain , and muscle strength improved gradually . One year later , he showed no neurological deficits . Neuralgic amyotrophy in the lower extremities is rare , but awareness of this disorder helps us avoid unnecessary surgical investigations and leads to possible treatment with immunomodulative therapy .

Diseases
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Diseases presenting "weakness of the right leg" symptom

neuralgic amyotrophy

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