Early diagnosis of colorectal cancer that. The middle-aged or middle-aged and older patients (especially familial colorectal cancer or intestinal polyps), any recent unexplained blood or bowel habits will change, or unexplained iron deficiency anemia, we should first consider the possibility of this disease, we must lose no time to carry out the inspections.
(A) stool examination: fecal occult blood test for the diagnosis of the disease were not specific, but the method is simple and can be used as screening tools census, or provide clues to early diagnosis.
(2) digital rectal examination: My segment of rectal cancer than seen abroad, about 77.5%, the majority of rectal cancer in the rectum examination when touched.
(3) sigmoid endoscopy: 77.7% of colorectal cancer in the rectum and sigmoid colon, the sigmoid used by the 30cm long, can be directly found anal canal and rectum and sigmoid middle of the following tumors.
(4) barium enema X-ray examinations: sigmoid colon lesions in the upper position or higher are required to conduct barium enema X-ray examination. General barium enema X-ray examination of small colorectal cancer easily missed, the best use of double-contrast barium can improve diagnostic accuracy rate, and show the location and extent of tumor.
(5) fiber colonoscopy examination: to be clear of all colon, and in the heart of forceps from a pathological examination of suspicious lesions is conducive to the early and small colon cancer diagnosed and found to further increase the rate of correct diagnosis of the disease, colorectal cancer is the most important means of inspection.
(6) serum carcinoembryonic antigen (CEA) Determination: In the serum of patients with colorectal cancer can be detected carcinoembryonic antigen (CEA), which is a glycoprotein, often seen in the serum of patients with cancer, colorectal cancer is not related to the specific antigen, serum CEA determination is the right of consultation Broken not specific. But by RIA detection of CEA for quantitative dynamic observation of the effects of judgment and monitoring colorectal cancer recurrence after a certain significance. If colorectal cancer by surgery after resection of the tumor completely, serum CEA is gradually declining; If relapse, but also increased again.
(7) Other inspections: rectal ultrasound scan can clearly show rectal mass, size, depth and the surrounding tissue, and can distinguish between layers of the wall straight micro-structure, inspection method is simple, rapid delivery of images to choose surgery, postoperative follow-up to a certain extent help. CT examination of tumor infiltration of the intestine, liver and lymph node metastasis of important significance to the recurrence of rectal cancer diagnosis more accurate.
http://www.cancer-research.org.cn/category/Colorectal-cancer/