Billy Joel's wife thanks fans for 'outpouring of love' amid singer's brain disorder diagnosis

Billy Joel's wife shared a message from the iconic musician's Instagram page Monday, thanking fans for their love and support amid her husband's brain disorder diagnosis.

Billy Joel's wife shared a message from the iconic musician's Instagram page Monday, thanking fans for their love and support amid her husband's brain disorder diagnosis.

Joel, 76, canceled his upcoming concert dates Friday and shared he was diagnosed with normal pressure hydrocephalus, or NPH, a condition in which cerebrospinal fluid builds up inside the skull and presses on the brain.

Alexis Roderick Joel said Monday that their family is "so grateful for the wonderful care and swift diagnosis we received."

The condition has been "exacerbated by recent concert performances, leading to problems with hearing, vision and balance," said a statement posted on Joel's Instagram on Friday. It is most commonly diagnosed in older adults, usually around age 70.

Joel is receiving treatment for the condition, including "specific physical therapy," the statement said. Doctors told NBC News that NPH is often treatable and can even be reversed.