If you’ve heard of frontotemporal dementia (FTD), it may be because of Bruce Willis or Wendy Williams — two celebrities whose diagnoses in recent years have shed light on this infrequently discussed neurodegenerative disease. Though FTD is relatively rare, accounting for about 5 percent to 10 percent of all dementia cases and affecting an estimated 50,000 to 60,000 people in the United States, it’s the most common form of early-onset dementia.
