A 70-year-old right-handed man with a history of stable ocular myasthenia gravis presented with progressive pins and needles in his hands, progressing to numbness over a few months. He described an inability to hold a golf club. He said that if he put a hand into a bag, he would not be sure without visual help if he would take out the intended object. His legs had also started to feel weak. On moving in a certain way, he experienced a stinging electrical shock feeling throughout his body. In the few weeks before a neurological consultation, his right foot had become weak. He also developed bladder urgency but had no problem with his bowels.