plasmacytoma
Pronunciation: plaz′mă-sī-tō′mă
Definition: A discrete, presumably solitary mass of neoplastic plasma cells in bone or in one of various extramedullary sites; in humans, such lesions are probably the initial phase of developing plasma cell myeloma.
[plasmacyte + G. -oma, tumor]
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Examples: glitazone, GI cocktail, etc.
