Adrenoleukodystrophy is a disease that is linked on the X chromosome. It is a result of fatty acid digestive enzymes not breaking up the fats. These fats build up in the brain. They damage the myelin that surrounds nerves. This can cause seizures and hyperactivity. It can also cause problems with speaking, listening and understanding verbal instructions.

About 1 in 17,000 people are born with a genetic disease called adrenoleukodystrophy (ALD). This severe brain disorder mainly affects boys and men. There’s no cure yet for it, but a diagnosis early in life may keep it from getting worse.