What it is
The term describes a subtle, hazy increase in lung density that does not blot out the underlying vessels. It can come from infection, inflammation, or other processes.
How common is it?
Frequently reported, especially after respiratory infections. Context and follow-up matter more than the term alone.
What's usually next
Often a follow-up scan after several weeks to see whether it resolves. Persistent areas may be evaluated further.
When it usually isn't — and when it might be — worrying
Usually reassuring
- Appears after a recent infection
- Described as “likely inflammatory/infectious”
- Resolves on follow-up imaging
Worth discussing with your doctor
- Persistent or growing over follow-up
- A single focal area that does not resolve
- Recommended shorter-interval follow-up
Questions to ask your doctor
- 1Could a recent infection explain this?
- 2What follow-up interval do you recommend?
- 3Is it in one spot or several?
- 4What symptoms should prompt me to call?
Educational use only. This explanation helps you understand terminology on your report. It is not a diagnosis, is not FDA-cleared, and does not replace your doctor. Bring questions to your care team.