A man, 55-year-old engineer, was evaluated in the neurology unit presenting a 2-years history of progressive weakness initially on left lower limb, ascending after 6 months to the left upper limb. He had difficulties to walk and constantly fell down. He described occasional feeling of muscle twitches and frequent cramps in the left leg. He denied any abnormal sensation or altered perception. He didn’t have abnormal bladder and bowel function or difficulties to swallow.
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