[Recurrent amyotrophic neuralgia with an unusual clinical expression. Clinical and electrophysiological study].

Neuralgic amyotrophy (NA) is an entity with great variability in its neurological expression. The patient reported here developed symptoms of NA one year before admission, with anterior interosseous nerve palsy. At the time of examination she reports pain in the left upper limb followed by sensory loss over lateral antebrachial cutaneous nerve. Electrophysiologic examination showed signs of chronic denervation in the right anterior interosseous nerve muscles, and reduced amplitude of the sensory nerve action potential of the left lateral antebrachial cutaneous nerve. This case confirms the variety of the nerve involvement in NA, and suggests axonal focal lesions of nerve fascicles or individual peripheral nerve affectation.