Guides › A lung nodule on your CT scan: what it means
Plain-English guide
A lung nodule on your CT scan: what it means
Hearing “there’s a spot on your lung” is scary. The good news: most lung nodules are not cancer. Here is what to know.
What is a lung nodule?
A nodule is a small, round spot in the lung, smaller than 3 cm (about an inch). They are very common, especially in adults over 50. Most come from old infections or scars.
Why size matters
Doctors measure nodules in millimeters (a pea is about 8 mm). Very small nodules (under 6 mm) are usually just watched. Larger or growing nodules get a closer look. A follow-up CT in a few months is very common and is how doctors check if a spot is changing.
Words you may see
- Solid / part-solid / ground-glass: how dense the spot looks.
- Calcified: has calcium in it, usually a sign it is old and harmless.
- Spiculated: has spiky edges; doctors look more closely at these.
- Fleischner / Lung-RADS: guidelines doctors use to decide when to re-scan.
How MyScanGuide helps
Our High-detail CT ($150) uses several AI nodule tools to find and measure spots, explains them in plain words, and builds a 3D model showing where each spot is. You get questions to ask your doctor about next steps.
Get your scan explained
Plain-English explanation and questions for your doctor. High-detail CT: $150.
Questions
Is a lung nodule cancer?
Most are not. Your doctor will look at the size, shape and your history, and often re-scan to see if it changes.
Can AI measure my lung nodule?
Yes. AI tools can find and measure nodules and compare them between scans. Your doctor makes the final call.
For information only. Not medical advice. MyScanGuide is not a doctor and does not diagnose or treat. Always talk with your own doctor. In an emergency, call 911.