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• W55398840 abstract "Various histogenetic mechanisms have been postulated to explain the biphasic carcinomatous-sarcomatous appearance of malignant mixed mullerian tumors (MMMTs), but the nature of these uncommon neoplasms is still unclear. Some evidence would suggest that MMMT displays similarities with sarcomatoid carcinoma, a tumor arising in extragenital sites that also features a mixed appearance. To gain further insight into the histogenesis of this tumor, we have studied by immunohistochemistry a case of uterine MMMT showing an extensive rhabdomyosarcomatous component.A panel of antibodies including reactivity for p53, cytokeratin, vimentin, desmin, muscle actin, epithelial membrane antigen (EMA), myoglobin, type IV collagen, laminin, and tenascin was applied to paraffin tumor sections by means of the avidin-biotin complex technique.p53 immunoreactivity was observed in approximately the same number of cells in carcinomatous and sarcomatous tissue. The former stained for vimentin, cytokeratin and EMA, while the latter, in addition to expressing vimentin, desmin, muscle actin and myoglobin, also exhibited immunoreactivity for epithelial markers such as cytokeratin and EMA. At the borders between carcinoma and sarcoma the basement membrane pattern, as seen by staining for type IV collagen and laminin, showed interruptions in correspondence with areas of transition between the two tissues. Antibody to tenascin strongly labeled the sarcomatous tissue immediately around carcinomatous elements.A similar immunoreactivity for p53 in both carcinomatous and sarcomatous components, expression of epithelial markers in the sarcomatous cells, and disruption of the basement membrane profile in areas of transition between carcinomatous and sarcomatous tissue, would all suggest, as has been postulated for extragenital sarcomatoid carcinomas, an origin from a common epithelial clone and an epithelial-to-mesenchymal transformation-based mechanism of development for this MMMT. In addition, these findings provide further analogies between these categories of tumors, supporting a unifying nosological concept for MMMTs and sarcomatoid carcinomas of non-genital tract origin." @default.
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• W55398840 date "1998-05-01" @default.
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• W55398840 title "Malignant Mixed Müllerian Tumor of the Uterus. Features Favoring its Origin from a Common Cell Clone and an Epithelial-to-Mesenchymal Transformation Mechanism of Histogenesis" @default.
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• W55398840 doi "https://doi.org/10.1177/030089169808400316" @default.
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