these tumours lack osteoid and cells interpretable as osteoblasts or osteoclasts ( though they destroy bone ) . ( d ) tumours classifiable as fibrosarcomata occur rarely , and may be truly of fibroblastic origin or be mutated osteosarcomata . ( e ) lymphomata also occur when the marrow is irradiated ( ( 90 ) sr- ( 90 ) y and pu ) .
C0029418
osteoblasts
C0029463
osteosarcomata