Muscular Dystrophy-Dystroglycanopathy , Type a, 7, also known as mddga7, is related to congenital muscular dystrophy-dystroglycanopathy a7 and muscular dystrophy-dystroglycanopathy. An important gene associated with Muscular Dystrophy-Dystroglycanopathy , Type a, 7 is CRPPA (CDP-L-Ribitol Pyrophosphorylase A). Affiliated tissues include eye and brain, and related phenotypes are hydrocephalus and elevated circulating creatine kinase concentration