Partially ulcerated colonic mucosa shows underlying invasive carcinoma formed of irregular and crowded glands with lining by non-mucigenic malignant columnar cells exhibiting moderate anaplasia & mitosis. There are areas of extracellular mucin.
Friable easily bleeds, fungating ulcerating tumor partially occluding the rectal lumen. Bleeding per rectum.
Fragments of collective size 4x4 mm.
Rectal mass, endoscopic biopsy: