One had a history and subsequent course compatible with previously undiagnosed Alzheimer-type dementia, one had confusion accompanying heart failure and systemic upset associated with pre-existing nephrotic syndrome, and the third had mild continuous drowsiness associated with signs of Miller-Fisher syndrome, including marked ataxia.
The incidence of cranial nerve involvement, 16%, is in the lower range of the published rates of 15-46% (19); however our series excluded Miller-Fisher syndrome.