What does “Cannot be excluded” mean on a radiology report?
The images are not able to completely rule this out — which is a statement about the limits of the scan, not a suggestion that it is likely.
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General explanations of common wording, not advice about your own scan. Ask the doctor who ordered it what your results mean for you.
What Radily gives back
Your chest CT report says
Scattered ground-glass opacities are noted in the bilateral upper lobes measuring up to 8mm. No consolidation, pleural effusion, or pneumothorax.
Radily explains
Your scan shows some small hazy areas in the upper part of both lungs. There is no solid patch of the kind pneumonia makes, no fluid around the lungs and no collapsed lung.
Ask your doctor: what might be causing the hazy areas, and do I need a follow-up scan?
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Why the radiologist wrote it that way
Radiologists are careful about certainty in both directions. If an appearance is probably nothing but overlaps with something that would matter, they cannot honestly write it off, so they name the possibility and say it cannot be excluded. Leaving it unsaid would be the actual failure.
Is this good or bad news?
This phrase causes more fear than almost any other, especially in the form "malignancy cannot be excluded". Read it as the low-confidence end of the scale, not the high one. Radiologists have stronger language available when they think something is likely — "suspicious for", "consistent with", "probable" — and they use it. Choosing "cannot be excluded" is usually a signal that they consider it unlikely but are not willing to state it as impossible from images alone. It is normally followed by a suggested way to settle the question.
What it does not mean
- That the radiologist thinks you have this. If they did, they would say so more strongly.
- That it is a fifty-fifty chance. The phrase carries no probability at all.
- That nothing can be done. It is nearly always paired with a next step that resolves the uncertainty.
Where you will see it
Words in this phrase
- ImpressionThe radiologist's summary and conclusion about the findings.
- MalignancyCancer. Malignant tumors can spread to other parts of the body.
- LesionAny abnormal area of tissue - can be benign or malignant.
- NonspecificA finding that is real but whose appearance does not point to one particular cause. Common, and usually a statement about the limits of the image rather than a worrying result.
One phrase is not the whole report
What this sentence means for you depends on everything else your report says. Radily reads the whole thing and explains it in plain English — and can talk you through it on video, so you are not reading medical language alone.
Other phrases on your report
- NonspecificThe finding is real, but its appearance is not distinctive enough to say what is causing it.
- Small pleural effusionA small amount of fluid has collected in the space between the lung and the chest wall.
- Hepatic steatosisFat has built up in the liver — commonly called fatty liver.
- Small vessel ischemic changesSmall spots in the brain’s white matter, very common with age, reflecting changes in the smallest blood vessels.
This explains how a phrase is commonly used in radiology reports. It is not a diagnosis, not a reading of your scan, and not medical advice. Only your doctor can tell you what your own report means.