Osteogenesis Imperfecta, Type Xvii, also known as osteogenesis imperfecta type 17, is related to osteoporosis, juvenile and osteogenesis imperfecta, type vi. An important gene associated with Osteogenesis Imperfecta, Type Xvii is SPARC (Secreted Protein Acidic And Cysteine Rich). Affiliated tissues include bone and skin, and related phenotypes are reduced bone mineral density and osteoporosis