Credit: iStock/aldomurillo Normal pressure hydrocephalus (NPH) is often called the “treatable dementia,” yet many people had never heard of it until singer-songwriter Billy Joel announced his diagnosis in 2025. Despite affecting up to 5% of adults over age 80, it is frequently mistaken for normal aging, Alzheimer’s disease or Parkinson’s disease. In NPH, cerebrospinal fluid—the … Continue reading What Is Normal Pressure Hydrocephalus?