A story about a 15-year who has the rare Pelizaeus-Merzbacher disease, a neurological disorder, includes comments by James Garben, associate professor of neurology at the School of Medicine's Center for Molecular Medicine. He points out that the disease is often misdiagnosed as cerebral palsy and explains the genetic cause of the disease. Since the disease is inherited from a recessive gene, potential parents can undergo genetic screening to increase the chance of their not giving birth to a child with the disease.