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.

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.

It’s a condition that affects more than 700,000 people in the United States, but most of us had never heard of normal pressure hydrocephalus, or NPH, until last week. Singer Billy Joel announced he has the disease and is cancelling a planned tour.