A 4-Year-Old Boy with Ascending Weakness and a New ‘Skin Tag’

4-year-old boy from Singapore, while on vacation in the United States (fi rst to Georgia and then Washington, D.C.), was evaluated for a subacute progressive ascending weakness. Five days before, he had noted the onset of vague paresthesias and muscular pains beginning in the distal left leg and later in the distal right leg. There was a gradual progression of diffi culties with walking during the next 5 days.