Few CD68+ macrophages were observed in the prostate stroma of controls (Fig 1A and 1B) and only some CD68+ cells were attracted to the tumor-adjacent prostate tissue of less aggressive G tumors (Fig 1A and 1B) compared to the considerably more macrophages attracted to the tumor-adjacent prostate tissue in animals with aggressive AT-1 and MatLyLu tumors (Fig 1A and 1B). This evidence concerns the gene CD68 and neoplasm.