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The World Trade Center Health Program: Cancer screening and cancer care best practices
Published in Archives of Environmental & Occupational Health, 2023
Geoffrey M. Calvert, Gerald Lilly, John Cochran
An advantage of screening colonoscopy and flexible sigmoidoscopy over fecal tests is that many lesions can be removed at the time of screening colonoscopy and sigmoidoscopy, which means that screening can be diagnostic, therapeutic, and can prevent colorectal cancer deaths.19,20 Although screening colonoscopy reduces risk of cancer in both the distal and proximal colon, flexible sigmoidoscopy reduces cancer risk only in the distal colon, likely due to its shorter depth of insertion.21