Medical Definition of FTD
frontotemporal dementia Three new studies show that mutations in the gene that encodes the tau protein underlie some forms of frontotemporal dementia (FTD). Though less common than Alzheimer's disease, FTD is one of the most prevalent forms of dementia, accounting for 5 to 10 percent of cases.—Nathan Seppa, Science News, 20 June 1998
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