Q: What are signs of early colorectal cancer and precancerous lesions?
A:
(1) Early colorectal cancer refers to cancerous cells confined to the mucosa lamina propria or penetrating through the muscular layer of the colorectal mucosa to infiltrate the submucosal layer, but not involving the muscularis propria.
(2) Precancerous lesions include adenomatous polyps, serrated polyps, and polyposis (adenomatous polyposis and non-adenomatous polyposis).
Q: What are the pathological types and stages of lesions associated with screening?
A: Histologic types of colorectal cancer include:
(A) Non-specific type adenocarcinoma
(B) Special types: serrated adenocarcinoma, adenomatoid adenocarcinoma, micropapillary adenocarcinoma, mucinous adenocarcinoma, signet ring cell carcinoma, medullary carcinoma, adenosquamous carcinoma, undifferentiated carcinoma
A: According to the American Cancer Consortium (AJCC) TNM Staging System (8th Edition), pathological stages of colorectal cancer are divided into stages 0, I, II, III and IV.
Post time: Feb-28-2023