Sigmoidoscopy
Alternate Names : Proctoscopy, Proctosigmoidoscopy
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Colonoscopy
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There are 3 basic tests for colon cancer: a stool test (to check for blood); sigmoidoscopy (inspection of the lower colon; and colonoscopy (inspection of the entire colon). All 3 are effective in catching cancers in the early stages, when treatment is most beneficial.
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Anal Biopsy
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Anal biopsy can be used to determine the cause of blood, mucus, or pus in the stool. Anal biopsy can also confirm findings of another test or X-rays, or take a biopsy of a growth found in the colon.
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