What does “Small pleural effusion” mean on a radiology report?
A small amount of fluid has collected in the space between the lung and the chest wall.
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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
There is normally a trace of lubricating fluid in that space. When there is more than usual, it pools at the base of the lung where gravity takes it, and shows up as a blunted or hazy corner on the image. "Small" is the radiologist grading the volume.
Is this good or bad news?
What matters is the cause rather than the fluid, and causes range from the very ordinary — a recent chest infection, recent surgery, lying down for a long period — to conditions needing treatment, such as heart failure. Small effusions are common and often resolve on their own. The report describes the fluid; your doctor works out why it is there, usually with your symptoms and history in hand.
What it does not mean
- Water in the lungs in the drowning sense. The fluid is outside the lung, not inside it.
- That it is necessarily serious. Volume and cause are different questions.
- That it needs draining. Small effusions usually do not.
Where you will see it
Words in this phrase
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.
- 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.