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- W2149222738 abstract "We studied the histopathologic, immunohistochemical, and ultrastructural features of the extracellular matrix (ECM) in 20 immunologically defined large-cell lymphomas, including immunoblastic sarcoma of B cells (three patients), peripheral T cell lymphoma (five patients), large non-cleaved follicular center cell (FCC) lymphoma (nine patients), and non-marking large-cell lymphoma (three patients). Immunohistochemical studies were performed with antibodies to laminin, fibronectin, and collagen types I, III, IV, and V. The immunologically defined subgroups demonstrated characteristic differences in ECM in light microscopic appearance, composition, and ultrastructural features. Immunoblastic sarcomas of B cells showed delicate intercellular bands that were apparent only at high power but were distinct in exhibiting focal staining for basement membrane elements (laminin and type IV collagen) in addition to type I collagen and fibronectin. Electron microscopically, no basal lamina were apparent, although the collagen fibers were embedded in a dense matrix not seen in the other lymphomas. All peripheral T cell lymphomas exhibited a packeting pattern of intercellular bands and were distinguished by the frequent presence of intense pericellular staining for type V collagen as well as by focal pericellular staining for types I and III collagen. The latter finding corresponded to extensive areas of direct contact between tumor cells and the ECM by electron microscopy. The large non-cleaved FCC lymphomas and the non-marking large-cell lymphomas demonstrated both diffuse and compartmentalizing arrangements of intercellular bands that frequently coexisted and stained predominantly for fibronectin and types I and III collagen. All groups demonstrated myofibroblasts and fibroblasts partially or completely separating the ECM from tumor cells, suggesting that most of the ECM is part of a reaction to these lymphomas. These studies show more variation in light microscopic appearance, composition, and ultrastructural relationships of the intercellular and pericellular ECM than was apparent in earlier studies of cleaved FCC lymphomas." @default.
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- W2149222738 date "1989-02-01" @default.
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- W2149222738 title "The extracellular matrix in large-cell lymphomas: A histopathologic, immunohistochemical, and ultrastructural study" @default.
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- W2149222738 doi "https://doi.org/10.1016/0046-8177(89)90181-0" @default.
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