Difficulty in differentiating two cases of sigmoid stenosis by diverticulitis from cancer

Figure 3 Magnified pathological image of resected specimen. A: A magnified pathological image of the resected specimen reveals some diverticula in the sigmoid colon (HE stain, 10 ×); B: A magnified pathological image of the marked square in Figure 4A (diverticulosis) shows active inflammation characterized by a marked thickening of the muscularis propria, fibrous thickening of interstitial tissue, and a marked infiltration of inflammatory cells with no evidence of malignancy (100 ×).