Clinical Presentation A 57-year-old man presents to the emergency unit with 4 days of difficulty in walking due to the clumsiness of both of his feet. He explains that he bumps into the steps as he is walking and that he needs to hold onto the handrail on the staircase for balance when walking up or down the stairs in his house. He also has had intermittent numbness and tingling in his feet, left leg, and hands for about 3 months. He has not had any recent fevers, signs of infection, or injuries. He has no visual changes or cognitive symptoms.
History His past medical history is significant for hypertension and seasonal allergies. Over the past 10 years, he occasionally had a sensation of numbness and tingling of his hands and feet, without any particular pattern or preceding event. These episodes have resolved on their own. He had reported an infection 4 years ago, from which he felt…
