A member asked:

Are occult blood tests for colon cancer reliable?

5 doctors weighed in across 2 answers
Dr. Liawaty Ho answered

Specializes in Hematology and Oncology

Not really: The sensitivity of occult blood test is very low -about 20-25% if it is done only once. If it is done in 3 separate occasions- the sensitivity of the test to check for GI bleeding will be higher up to 90%. However, the test's accuracy for colon cancer is not high as GI bleeding can be caused by so many things-hemorrhoids, avm, gastric ulcer etc. Colonsocopy needs to be done if occult blood is +.

Answered 3/12/2020


Dr. Rafael Lugo answered

Specializes in General Surgery

Screening: It is a good start specially of yo had before and they were normal.

Answered 3/6/2015



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