Osteogenesis Imperfecta, Type Xiii, also known as osteogenesis imperfecta type 13, is related to atypical teratoid rhabdoid tumor and low grade glioma. An important gene associated with Osteogenesis Imperfecta, Type Xiii is BMP1 (Bone Morphogenetic Protein 1). Affiliated tissues include bone and skeletal muscle, and related phenotypes are hypotonia and increased bone mineral density