osteogenesis imperfecta type 8 (Monarch Disease Ontology identifier MONDO_0012581) is any osteogenesis imperfecta in which the cause of the disease is a mutation in the P3H1 gene. Also known as: OI8, P3H1 osteogenesis imperfecta, osteogenesis imperfecta caused by mutation in P3H1, osteogenesis imperfecta type VIII.