Fig. 4From: Two rare cases of synchronous and metachronous colonic metastases in patients with advanced gastric cancera Poorly differentiated carcinoma involving colonic submucosa HE (× 40); b CDX-2 staining with weak and faintly positive results (× 100); c CK20 staining with negative results (× 100); and d CK7 staining with positive results (× 400)Back to article page