Rectal cancer images can be categorized into endoscopy, X-ray imaging, CT, MRI, etc., and their characteristics are as follows:
1. Endoscopy: it can see cauliflower-like mass or depressed ulcer in the rectum, with dirty surface, stiff texture and easy bleeding on touch.
2. X-ray imaging: irregular filling defects, niches or stenosis can be seen in the rectal wall, accompanied by rigidity of the rectal wall, destruction of mucosa and other signs, then rectal cancer is highly probable.
3. CT: Early rectal cancer patients often show flat, non-tibial mass with complete outline or polyp with short thick tip, and the head end of polyp is irregular or lobular. In the middle and late stages, patients often have cauliflower-shaped masses protruding into the intestinal lumen, thickening of the intestinal wall in the form of a ring or semi-ring and narrowing of the intestinal lumen, and other related manifestations.
4. MRI: MRI is the most accurate method for local staging of rectal cancer. Rectal mesentery shows high signal in both T1 and T2 images; rectal mesentery and fascia show linear low signal; it can be seen whether the tumor grows to the circumferential fascia and surrounding lymph nodes, and whether there is extra-luminal blood vessel invasion.
If there is any physical discomfort, one should go to the hospital in time and consult a specialist to guide the examination.