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6 Cards in this Set
- Front
- Back
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ewing sarcoma
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the second most common type of bone tumor (after osteosarcoma) in children and adolescents. The tumor is usually a lytic bone lesion, and often both invades the medullary cavity of the bone and extends into extraosseous tissues. Grossly, the tumor is often tan-white in color and shows focal areas of hemorrhage and necrosis. Microscopically, it is composed of sheets of small, round cells with scanty cytoplasm that may appear clear because of their glycogen content.
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chondrosarcoma
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composed of malignant hyaline and myxoid cartilage.
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Giant cell tumor of bone
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contains multinucleated giant cells in a background of mononuclear stromal cells
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Malignant fibrous histiocytoma
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background of spindled fibroblassts in storiform pattern admixed with bizarre, multinucleated tumor giant cells
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Osteosarcoma
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characterized by anaplastic to well differentiated tumor cells that are focally making bone
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homer write pseudorosettes
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circular arrangements of tumor cells around a central fibrillary space (composed of neurites) and these pseydorosettes specifically suggest differentiation along neural lines.
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