Fig. 8

Macroscopic and histopathological features of right hemicolectomy specimens. Gross findings of the ascending colon (A), hematoxylin and eosin (HE) staining (B) and Alcian blue-periodic acid Schiff (AB-PAS) staining (C) of the tumor, and HE staining of the metastatic site of the lymph node (D). Accumulation of polypoid gross features of the mucosal surface and wall thickening were found (A). The histological type of the tumor is mainly poorly differentiated adenocarcinoma (PDA) (B) with scant intracytoplasmic mucin (C). Metastatic PDA without a signet-ring cell component is observed in the lymph node (D). B–D Original magnification × 400. Each bar displayed at the bottom right indicates 100 μm