Danny Bonaduce to undergo brain surgery for hydrocephalus.

Danny Bonaduce, former child actor and radio host, has been diagnosed with hydrocephalus, also known as "water on the brain," and will undergo brain surgery to have a shunt placed to drain the fluid. Bonaduce has been on medical leave from his radio show and has been experiencing difficulty walking. He attributes the disorder to various injuries sustained during his career, including being hit in the head with a guitar and punched by a professional athlete.