What does “Hypodense lesion” mean on a radiology report?
An area that looks darker than the tissue around it on a CT scan.
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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
Purely a description of brightness. "Hypo" means less, "dense" refers to how much X-ray the tissue absorbs. Fluid absorbs less than solid tissue, so it appears darker. The radiologist is describing appearance, deliberately, before interpreting it.
Is this good or bad news?
Both words sound worse than they are. "Lesion" simply means an area that differs from its surroundings — it does not imply cancer or damage. The most common hypodense findings in organs like the liver and kidney are simple cysts, which are harmless and extremely common. Whether one needs any attention depends on its edges, its size and whether it takes up contrast.
What it does not mean
- A tumour. "Lesion" is a neutral descriptive word.
- Damage or a hole. It is a difference in brightness, nothing more.
Where you will see it
Words in this phrase
- HypodenseAppears darker on CT scan, indicating lower density tissue.
- LesionAny abnormal area of tissue - can be benign or malignant.
- CystA fluid-filled sac. Usually benign and often harmless.
- AttenuationHow much X-rays are absorbed by tissue. Dense tissue (bone) shows high attenuation (bright), while air shows low attenuation (dark).
- DensityHow solid or compact tissue appears on imaging. High density = bright (bone), low density = dark (air).
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
- Cannot be excludedThe 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.
- 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.
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.