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||25%||Unlikely|
|Stomach Cancer||3%||Ruled out|
|Stomach Ulcers||2%||Ruled out|
|Crohn's Disease||0%||Ruled out|
|Rectal Cancer||0%||Ruled out|
|Ulcerative Colitis||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