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TGF-β expression in low- and high-grade gliomas. TGF-β (brown granular staining) was most strongly expressed in the cytoplasm of vascular endothelial cells. TGF-β expression was greater in (B) high-grade gliomas than in (A) low-grade tumors. SABC staining, magnification, ×200. TGF-β, transforming growth factor-β; SABC, streptavidin-biotin complex.
