A 20-year-old male student complained of a balance problem for over a year. He had noticed poor balance in a shower on closing his eyes, falling on one occasion. He sometimes stumbled when walking. He had noticed that he sometimes stepped sideways to maintain his balance. He had fallen off a bicycle on a couple of occasions. He was sometimes unaware that he had crossed his legs. He felt that his writing had slowed. At times he thought that his speech was slurred, although this was not noticed by his family. He had had a couple of migraines over a few years. He drank very little alcohol, was a non-smoker and denied any illicit drug use. His three siblings and parents were alive and well.