Fig. 5
From: Simultaneous colonic metastasis of advanced gastric cancer: a case report
A–F Histologic examinations of the gastric and colonic tumors. A Hematoxylin and eosin staining of the gastric tumor shows poorly differentiated adenocarcinoma with signet ring cell carcinoma (×20). Scale bar, 1000 μm. B, C Immunohistochemistry staining of the gastric tumor cells yields positive results for CK7 (B; ×200) and negative results for CK20 (C; × 200). Scale bar, 100 μm. D Hematoxylin and eosin staining of the colonic tumor shows poorly differentiated adenocarcinoma with signet ring cell carcinoma (×20). The mucosal surface of the colonic tumor shows normal mucosa with partial features of adenoma. Scale bar, 1000 μm. E, F Immunohistochemistry staining of the colonic tumor cells yields positive results for CK7 (E; ×200) and negative results for CK20 (F; ×200). Scale bar, 100 μm. CK cytokeratin