rhabdomyosarcoma

rhabdomyosarcoma /rhab·do·myo·sar·co·ma/ (mi?o-sahr-ko´mah) a highly malignant tumor of striated muscle derived from primitive mesenchymal cells.

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alveolar rhabdomyosarcoma  a type having dense proliferations of small round cells among fibrous septa that form alveoli, seen mainly in adolescents and young adults.

embryonal rhabdomyosarcoma  a type having alternating loosely cellular areas with myxoid stroma and densely cellular areas with spindle cells, seen mainly in infants and small children.

pleomorphic rhabdomyosarcoma  a type having large cells with bizarre hyperchromatic nuclei, seen in the skeletal muscles, usually in the limbs of adults.

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rhab·do·my·o·sar·co·ma (rbd-m-sär-km)

n.

A malignant tumor derived from skeletal muscle, characterized in adults by poorly differentiated cells with large hyperchromatic nuclei. Also called rhabdosarcoma.

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rhabdomyosarcoma (rab´dōmīō-särkō´m),

n a malignant tumor of striated, or voluntary, muscle.

Rhabdomyosarcoma.

Rhabdoviridae

n one of the major ribonucleic acid virus families, to which the rabies virus belongs. Viruses have a single-stranded, nonsegmented, linear molecular structure with helical symmetry.

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rhabdomyosarcoma

a highly malignant tumor arising in striated muscle or in embryonal mesenchymal cells, and exhibiting differentiation along rhabdomyoblastic lines, including but not limited to the presence of cells with recognizable cross striations.