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The density was calculated as the number of positive cells/HP (Y-axis), X-axis represents different infiltrating sites of primary lesions. A two-sided paired t test was applied to compare CT with IM. a: CD3 + T cell, b: CD8 + T cell, c: CD20 + B cell, d: CD68+ macrophage, e: CD163+ macrophage. CT: central area of tumor, IM: invasive margin, HP: high power field of view. (*represents P < .05, ** represents P < .005, ns: no statistical difference)
