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A 61-year-old male asked:

Hi doctors. my stool appeared blackish, but when i wiped it was yellow. i had a colonoscopy last october 2020 which showed diverticulosis but no colon cancer. could colon cancer develop in that time?

1 doctor answer • 1 doctor weighed in
Dr. Philip Schwarzman
Dr. Philip Schwarzmananswered
Emergency Medicine 48 years experience
Black stools are seen with upper GI bleeding (coming from the stomach) but would not clear so quickly. Certain foods and medicines can cause black stools (eg. iron, Pepto-Bismol). Colon cancer would not develop in 1 year.
Answered Nov 07, 2021
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Last updated Nov 7, 2021

Found in:

Cancer›Colon cancer›Colonoscopy

People also asked

Good morning doctors. I had a colonoscopy at the end of last October, 2020..no colon cancer only diverticulosis. Lately my stool is dark brown to almost black, but not quite black. What may this be?
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