the series included 12 osteogenic sarcomas , 4 ewing 's sarcomas , 3 chordomas , 3 myelomas , 2 chondrosarcomas , 2 undifferentiated sarcomas and 1 case each of normal bone and marrow elements , lymphoma and giant-cell tumor .
C0855073
undifferentiated sarcomas
C0262950
bone