<prompt> Epiphyseal origin tumour isOsteo claustomaOsteogenic sarcomaEwings sarcomaOsteo blastoma  <response>: Osteoclaustoma 181 - Apleys 8th Ewings sarcoma - is believed to arise from endothelial cells Diaphysis Osteogenic sarcoma - Metaphysis Chondrosarcoma - Any where in the bone Osteoclaustoma Chondroblastoma - Epiphysis Osteoblastoma - diaphysis or metaphysis Giant cell tumour oslcoclaustoma is a lesion of uncertain origin that appears in mature bone 