myelocytoma

A nodular focus or fairly well-circumscribed, relatively dense accumulation of myelocytes, as in certain tissues of persons with myelocytic leukemia. [myelocyte + G. -oma, tumor]

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my·e·lo·cy·to·ma .mī-ə-lō-sī-'tō-mə n, pl -mas also -ma·ta -mət-ə a tumor esp. of fowl in which the typical cellular element is a myelocyte or a cell of similar differentiation

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my·elo·cy·to·ma (mi″ə-lo-si-toґmə) 1. chronic granulocytic leukemia. 2. myeloma.