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contrast
(redirected from double contrast)

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While colonoscopy is considered the best screening test, other tests including fecal occult blood testing, flexible sigmoidoscopy, double contrast barium enema, and virtual colonoscopy are all worthwhile and can be lifesaving.
If colonoscopy is not available, double contrast barium enema (preferably with sigmoidoscopy and at least careful digital rectal exam) is an acceptable alternative.
Plus, two of the other three screening tests for colon cancer (flexible sigmoidoscopy and double contrast barium enema) also require a bowel prep and neither is as sensitive as the colonoscopy.
 
 
 
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