通过图示的结肠息肉状小腺瘤可以明确分化的概念。上方的为腺瘤上皮细胞，下方为正常结肠粘膜腺上皮。
The concept of differentiation is demonstrated by this small adenomatous polyp of the colon. Note the difference in staining quality between the epithelial cells of the adenoma at the top and the normal glandular epithelium of the colonic mucosa below.