I had a neurologist tell me recently that i have corticobasal degeneration. how common is this for someone my age (44)?

Unusual before age60: Corticobasal degeneration is a progressive neurological disorder characterized by nerve cell loss and atrophy (shrinkage) of multiple areas of the brain. Initial symptoms occur typically at or around age 60. This is highly unusual as diagnose in your age range. I would get a second opinion at a university center. You find more information under http://www.Curepsp.Org/.