Fig. 3.

Histopathology findings of the sigmoid tumor. (a) and (b) Infiltration of the colonic wall by glandular and cribriform tumor structures, accompanied by a moderately inflamed loose fibrous stroma, H&E ×40 and ×100 respectively. (c) Infiltration of the colonic wall by glandular tumor structures, H&E ×100. (d) The tumoral cribriform structures are lined with tall cylindrical cells, possessing irregularly stratified nuclei and basophilic cytoplasm with very low mucosecretory activity, H&E ×400.