Occult blood can have various causes, just like most other symptoms. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose occult blood, we could:
|Small Intestine Cancer||95%||Confirm|
|Rectal Cancer||2%||Ruled out|
|Carcinoid Cancer||1%||Ruled out|
|Ulcerative Colitis||1%||Ruled out|
|Colon Cancer||0%||Ruled out|
|Stomach Ulcers||0%||Ruled out|
Occult blood. Have lab tests found blood in your stool within the past 6 months?
Possible responses:→ Not tested within past 6 months / don't know
→ No, stool tested negative
→ In the past only, now resolved
→ Yes, trace or small amounts
→ Yes, enough for doctor to be concerned