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Experts recommend that most people start screening with a colonoscopy — or a similar procedure called a flexible sigmoidoscopy — at age 45.

These could be a colonoscopy - a procedure which uses a camera inside a long tube to look inside the whole bowel - or a flexible sigmoidoscopy, which looks at part of it.

During a sigmoidoscopy, she recalled, her gastroenterologist said, “Oh no. I was not expecting this!”

He performed a sigmoidoscopy, a procedure that uses a scope to examine the lower part of the colon.

Other methods include fecal occult blood tests and flexible sigmoidoscopy followed by colonoscopy if precancerous polyps are detected so they can be removed.