Muscular Dystrophy-Dystroglycanopathy , Type a, 9, also known as walker-warburg syndrome or muscle-eye brain disease, dag1-related, is related to congenital muscular dystrophy-dystroglycanopathy type a9. An important gene associated with Muscular Dystrophy-Dystroglycanopathy , Type a, 9 is DAG1 (Dystroglycan 1). Affiliated tissues include eye and brain, and related phenotypes are intellectual disability, severe and absent speech