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A member asked:
Lots of blood in stool but ct is clear. what could it be?
A doctor has provided 1 answer
Vasc Malformation: There can be bleeding from an abnormal collection of blood vessels on the surface of the colon lining. A colonoscopy may be able to identify it and to rule out a tumor which might have been missed on the ct. Hemorrhoids could also cause bleeding but should be easier to diagnose. Nuclear bleeding scans and sometimes angiography are used to nail down the location of the bleeding.
Answered 1/5/2019
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