700K people are likely living with this condition

Many people were unfamiliar with normal pressure hydrocephalus when superstar musician Billy Joel recently announced he was diagnosed with the condition. But the illness may be more common than we think, and is going undiagnosed.

“Around 700,000 people in the U.S. are likely living with this condition,” said Dr. Abhay Moghekar, associate professor of neurology at Johns Hopkins University. “We actually don’t have accurate prevalence measures, these are just estimates, but it’s likely a highly...