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  • Title: Distinction between carcinoma cells and mesothelial cells in serous effusions. Usefulness of immunohistochemistry.
    Author: Tickman RJ, Cohen C, Varma VA, Fekete PS, DeRose PB.
    Journal: Acta Cytol; 1990; 34(4):491-6. PubMed ID: 2197840.
    Abstract:
    The usefulness of an immunoperoxidase battery to distinguish carcinomatous from benign effusions was examined. Cell block sections from 90 previously diagnosed effusions were stained with antibodies to Leu-M1, B72.3, epithelial membrane antigen (EMA), carcinoembryonic antigen (CEA) and vimentin. The 90 cases comprised 69 carcinomas (23 mammary, 16 ovarian, 10 pulmonary, 7 gastrointestinal [GI] and 13 others), 2 malignant mesotheliomas and 19 cases with reactive mesothelial cells only. EMA and vimentin were the most useful markers for distinguishing carcinoma cells from reactive mesothelial cells. EMA reacted with 86% of the carcinomas while vimentin reacted with 90% of the reactive cases. Leu-M1, B72.3 and CEA, although generally less sensitive than EMA, were also helpful in this regard. Additionally, the use of Leu-M1 and CEA together may help to distinguish pulmonary from GI carcinomas.
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