Fig. 2

A The lesion was en bloc resected. B The specimen was sectioned at 2 mm intervals. C Histology showed poorly differentiated colorectal cancer with partial submucosal infiltration (black arrow). Stain: hematoxylin and eosin. D In some sections, histology showed a few normal glandular ducts (black arrow) surrounded by tumors cells, which is corresponding to the endoscopic feature, i.e., small roundish pits scattered over the surface