Cannot be excluded
Read Your Scan Editorial Team·Last updated
Written from published radiology references and reviewed for plain language. Not written or signed by a physician, and not a diagnosis. How we write these pages →
In plain language
The scan cannot completely rule something out — it is not a statement that the thing is there. Radiologists write it because imaging has limits, and naming what those limits leave open is part of an honest report.
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Where you'll see this
Impressions across every modality, usually followed by the test that would settle it.
Your report may word it “Cannot be entirely excluded”, “Cannot be definitively excluded” or “Not excluded”. These mean the same thing.
Questions worth asking your doctor
- Does this wording mean you are unsure, or that you are reasonably confident and being careful?
- If something cannot be ruled out from this scan, what would rule it out?
- Is there anything here you would act on today?
How often does this turn up?
This is the most-searched hedge in radiology and one of the most anxiety-producing sentences a report can contain. It sits at the low-confidence end of the scale: the radiologist is not saying something is there, they are saying this examination could not rule it out. It appears constantly because imaging genuinely has limits, and naming them is part of an honest report.
Does it mean something is wrong?
The phrase is almost always less alarming than it reads, and the reason is structural. Radiologists are trained to name what a study cannot exclude precisely so that the referring doctor knows what remains open — it is a statement about the test, not a suspicion about you. A scan that could not exclude something is very different from one that found it, and where a radiologist genuinely suspects something they use different words: suspicious for, or consistent with. The phrase most often accompanies a normal or near-normal study whose technique or timing limited it.
What to do with it
A good report says in the same breath what would settle the question, and that is where the useful information is: a different scan, contrast, a repeat at an interval, or a test outside radiology. Frequently nothing further is needed at all, because the possibility named is remote and the referring doctor can exclude it clinically. If the phrase appears and nothing has been arranged, the fair question is not whether something was missed but whether the possibility it names needs pursuing in your case.
Frequently asked questions
- Does cannot be excluded mean they think I have it?
- No — close to the opposite. It means this examination could not rule it out. Where a radiologist actually suspects something, they say suspicious for or consistent with. This phrase describes the limits of the test rather than a level of concern.
- Why not just do the test that would settle it?
- Sometimes that happens. Often the possibility is remote enough that the referring doctor can exclude it from your symptoms and history without more imaging, which avoids cost, radiation and delay for something already unlikely.
- Should I ask my doctor about it?
- Yes, and it is a reasonable and specific question: does the thing that could not be excluded need excluding in my case? That is exactly the judgement the radiologist handed over, and your doctor is the one positioned to make it.
Careful and hedged wording
Where this word comes up
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