Brittle Bone Disorder, also known as osteogenesis imperfecta, is related to osteogenesis imperfecta, type i and osteogenesis imperfecta, type ii, and has symptoms including back pain, muscle cramp and sciatica. An important gene associated with Brittle Bone Disorder is COL1A2 (Collagen Type I Alpha 2 Chain), and among its related pathways/superpathways are Pleural mesothelioma and Collagen chain trimerization. The drugs Pamidronic acid and Alendronic acid have been mentioned in the context of this disorder. Affiliated tissues include bone and bone marrow, and related phenotypes are macrocephaly and gait disturbance