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Immune cell infiltrates in primary PDA lesions. (A) Representative images for CD4, CD8, CD56, CD68 and FoxP3 immunohistochemistry in primary PDA lesions. (B) Association between the number of tumor‐infiltrating CD4+ cells and CD8+ cells. (C) Association between the number of tumor‐infiltrating CD68+ cells and FoxP3+ cells. The number of positive cells shown is the total number of positive cells within three high‐power fields.
