Musician Billy Joel recently canceled his concert tour, announcing he will undergo physical therapy for a condition called normal pressure hydrocephalus that is affecting his hearing, vision and balance.

Dr. Jon LaPook joins "CBS Mornings Plus" to explain normal pressure hydrocephalus, the rare brain condition impacting Billy Joel's vision, balance and memory, and why it's often mistaken for Alzheimer's or Parkinson's disease.

Singer-songwriter Billy Joel’s upcoming tour dates have been canceled as he seeks treatment for normal pressure hydrocephalus, a condition that affects the brain. Symptoms might resemble dementia but it can be treated.