Abstract
Primary malignant mesenchymoma of bone is a rare neoplasm consisting of two or more unrelated malignant mesenchymal components other than fibrosarcoma or malignant fibrous histiocytoma. The literature reports fewer than 15 cases, most of which were composed of osteosarcoma and liposarcoma. We report an exceedingly rare case of primary malignant mesenchymoma of bone composed of osteosarcoma and rhabdomyosarcoma (osteorhabdomyosarcoma), arising in the right proximal tibia of a 21-year-old woman. We review the literature and compare primary malignant mesenchymoma of bone with dedifferentiated chondrosarcoma and conventional intramedullary osteosarcoma.
MeSH terms
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Adult
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Antibiotics, Antineoplastic / therapeutic use
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Antineoplastic Agents / therapeutic use
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Bone Neoplasms / diagnostic imaging
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Bone Neoplasms / drug therapy
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Bone Neoplasms / pathology*
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Cisplatin / therapeutic use
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Doxorubicin / therapeutic use
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Female
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Humans
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Mesenchymoma / diagnostic imaging
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Mesenchymoma / drug therapy
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Mesenchymoma / pathology*
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Osteosarcoma / diagnostic imaging
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Osteosarcoma / drug therapy
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Osteosarcoma / pathology*
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Radiography
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Rhabdomyosarcoma / diagnostic imaging
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Rhabdomyosarcoma / drug therapy
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Rhabdomyosarcoma / pathology*
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Tibia / diagnostic imaging
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Tibia / pathology
Substances
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Antibiotics, Antineoplastic
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Antineoplastic Agents
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Doxorubicin
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Cisplatin