oncocytoma on·co·cy·to·ma (ŏng’kō-sī-tō’mə)
n. pl. on·co·cy·to·mas or on·co·cy·to·mata (-mə-tə)
A glandular tumor that is chiefly composed of oncocytes, occurring most often in the salivary glands.


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  • Oncofetal

    oncofetal on·co·fe·tal (ŏng’kō-fēt’l) adj. Of or relating to substances associated with tumor formation and present in fetal tissue.

  • Oncofetal antigen

    oncofetal antigen n. One of the tumor-associated antigens present in fetal tissue but not in normal adult tissue, such as alpha-fetoprotein and carcinoembryonic antigen.

  • Oncofetal marker

    oncofetal marker n. A tumor marker produced by tumor tissue and by fetal tissue of the same type as the tumor, but not by normal adult tissue from which the tumor arises.

  • Oncogenesis

    [ong-kuh-jen-uh-sis] /ˌɒŋ kəˈdʒɛn ə sɪs/ noun 1. the generation of tumors. oncogenesis on·co·gen·e·sis (ŏng’kō-jěn’ĭ-sĭs) n. The formation and development of tumors.

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