An atypical form of Alzheimer's may be more widespread than previously believed. Researchers at the Mayo Clinic in Florida say the newly discovered strain could affect as many as 600,000 Americans.

The victims are mostly male and they're affected at a much younger age than typical patients. Symptoms range from profanity-laced outbursts to feeling their arms and legs are controlled by aliens. The victims also decline much faster than people with typical AD.

Over 5 million Americans have Alzheimer's Disease.

[Metro Networks]