Billy Joel cancels tour after brain disorder diagnosis: What is it?

Billy Joel has cancelled his concerts due to a diagnosis of normal pressure hydrocephalus (NPH), a brain disorder affecting hearing, vision, and balance. NPH involves excess fluid in the brain, mimicking conditions like Alzheimer's. Key symptoms include walking difficulties, cognitive decline, and urinary incontinence. While rare, it primarily affects those over 65 and can sometimes be treated with surgery.