Enchondroma or osteochondroma are non cancerous (benign) bone tumours. If you have these tumours, you are at an increased risk of getting types of bone cancer called chondrosarcoma or osteosarcoma.

Multiple Exostoses Syndrome: Increases the risk of osteochondroma (benign bone tumour) and osteosarcoma. Hereditary Retinoblastoma: Increases the risk of osteosarcoma, particularly in those with a ...