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Expression of CDX1 and Tcf4 of control and high-type ARMs, as revealed by immunofluorescence staining. Positive immunolabelling was detected as green for CDX1 protein in the histiocytic cytoplasm of the epithelium of the rectum and in the nuclei of intestinal villus in the control. Expression of CDX1 was weaker in the high-type ARMs patients than in the control group. A (CDX1), B (Tcf4), C (Merged): control; a (CDX1), b (Tcf4), c (Merged): ARMs.(original magnification×400).
