CD68 and neoplasm: The percentage of CD45+ cells (tumor core: median 1%, mean: 4%; perivascular area: median: 3%, mean: 7%; tumor infiltration zone: median: 3%, mean: 3%) was significantly lower than the percentage of CD68+ cells (tumor core: median 19%, mean: 22%%; perivascular area: median: 27%, mean: 27%; tumor infiltration zone: median: 19%, mean: 21%) within the tumor core (p < 0.01), perivascular area (p < 0.01) and tumor infiltrating zone (p = 0.01).