CBS Philly | UPenn Neurologists Finding New Ways To Diagnose, Treat Dementia Early CBS Philly Dr. David Irwin with Penn's Frontotemporal Dementia Center says PET scans highlighting abnormalities in the brain can now help pinpoint different kinds of dementia – Alzheimer's Disease or Frontotemporal dementia or Lewy Body Disease. “We would like to ... Evelyn Ward, David Cassidy's Mother: 5 Fast Facts You Need to Know EXCLUSIVE: David Cassidy Reveals Greatest Fear About His Dementia Struggle on 'Dr. Phil' Former Partridge Family Star David Cassidy Reveals He Has Dementia |