Piano Man' hitmaker Billy Joel was recently diagnosed with a brain disorder called NPH or Normal Pressure Hydrocephalus, which led him to cancel his upcoming concerts. But what is NPH? Read on and find out.

The “Piano Man” singer has been diagnosed with normal pressure hydrocephalus, which can cause mobility and cognitive issues.

Alexa Ray Joel praised dad Billy Joel’s resilience after his brain disorder diagnosis led to concert cancellations across the U.S. and England