Osteosarcoma of the scapula arising in osteogenesis imperfecta

A case of osteosarcoma arising in the scapula of a 37 year old woman with s evere congenital sporadic white sclera type osteogenesis imperfecta (OI) is presented. Osteosarcoma occurs as a sporadic rather than a related occurre nce in patients with OI. A delay in the diagnosis of osteosarcoma may occur due to the similarity in symptomatology between the two conditions and bec ause of the difficulty in differentiating between hyperplastic callus and t umor using conventional radiographic imaging techniques.