Table 4. Expression of CD68/CD163 in esophageal cancer tissues and adjacent tissue.

groups	n	CD68/CD163*			positi	P
		−	+	++	%
adjacent tissue	50	47/48	3/2	0/0	6	<0.05
cancer tissues	50	11/16	13/14	26/20	78/68

*Ten high magnification views were selected to count all cells, the cell color depth and the percentage of stained cells as the judgment result basis. According to the staining color (A): 0 = no color in cytoplasm; 1 = light yellow; 2 = pale brown; 3 = brown color. According to the percentage of stained cells (B): “0” indicates the percentage of positive cells <5%; “1″ indicates the percentage of positive cells 5%–25%; “2″ indicates the percentage of positive cells 26%–50%; “3” represents the percentage of positive cells >50%. The two scores of A plus B as a final judgment result: 0∼1: “−”; 2∼3: “+”; 4∼6: “++”.