Colorectal cancer ; sigmoidoscopy ; colonoscopy ; screening .
结肠直肠癌;乙状结肠镜检查;结肠镜检查;筛查。
Both a colonoscopy or sigmoidoscopy may reveal evidence of cancer , but only a colonoscopy examines the entire colon .
结肠镜或乙状结肠镜可以检查出结肠癌,大肠镜检查整个结肠。
Colorectal cancer ; fecal occult blood test ; sigmoidoscopy ; colonoscopy ; double-contrast barium enema .
结肠直肠癌;大便潜血试验;乙状结肠镜检查;结肠镜检查;双重对比钡剂灌肠法。
The tests carried out to diagnose colon cancer include a sigmoidoscopy or a colonoscopy .
测试进行诊断结肠癌包括乙状结肠镜或结肠镜检查。
Flexible sigmoidoscopy is often done as part of a routine screening for cancer for patients over 50 years old , before some surgeries , or to evaluate the causes of symptoms ( such as diarrhea , bleeding , colitis , changes in bowel habits and , changes in stool form or color ) .