Osteogenesis Imperfecta, Type Xv, also known as osteogenesis imperfecta type 15, is related to brittle bone disorder and brachydactyly, type b1. An important gene associated with Osteogenesis Imperfecta, Type Xv is WNT1 (Wnt Family Member 1), and among its related pathways/superpathways is Type I collagen synthesis in the context of osteogenesis imperfecta. Affiliated tissues include bone and brain, and related phenotypes are recurrent fractures and bowing of limbs due to multiple fractures