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TSP-1 expression in low- and high-grade gliomas. TSP-1 (brown granular staining) was mainly expressed in the cytoplasm and extracellular matrix of the glioma. Expression was much higher in (A) low-grade than (B) high-grade tumors. SABC staining, magnification, ×200. TSP-1, thrombospondin-1; SABC, streptavidin-biotin complex.
