small-cell osteosarcoma

small-cell osteosarcoma
a variant of osteosarcoma resembling Ewing sarcoma, composed of small round to spindle-shaped cells arranged in sheets or separated into lobules by fibrous septa, and having areas of osteoid and sometimes chondroid formation; called also polyhistiocytoma and multipotential primary sarcoma of bone.

Medical dictionary. 2011.

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