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A: Two representative dot plots showing CD45 and CD11b staining for normal PBMC samples by flow cytometry. Only CD45+/CD11b− and CD45bright/CD11b+ cells are visible. B: Ratio of CD45+/CD11b− to CD45+/CD11b+ cells for PBMCs and enhancing tumor specimens (GBMs). Marked differences are seen, suggesting that the CD45+ and CD11b+ cells in tumor specimens do not simply represent residual PBMCs. Each shape represents a tumor specimen taken from a specific patient.
