Nodule
A nodule is a small rounded or irregular area seen in tissue, commonly in the lungs, thyroid, liver, or elsewhere.
When to get help quickly: Most nodules are not emergencies, but faster review may be needed if there are worrying symptoms, rapid growth, or strong clinical concern for cancer or infection.
Common symptoms
Many nodules cause no symptoms and are found incidentally, though some can be linked to a lump, cough, pressure symptoms, or organ-specific complaints depending on where they are.
When imaging helps
Imaging helps show the nodule's size, edges, density, and change over time, which are important for deciding whether it is likely benign or needs closer follow-up.
What radiology does
Imaging helps assess size, shape, density, and change over time, which all help determine how concerning it may be.
What usually happens next
Some nodules are watched with follow-up scans, while others need biopsy or specialist review depending on the pattern and context.
Seen this on your report?
Your doctor or the radiologist who wrote it can tell you what it means for you.
Related articles
- What 'Diffuse' vs 'Focal' Means in RadiologyThese are common report words that describe pattern and spread. Knowing the distinction makes imaging language much easier to follow.
- What 'Prior Images for Comparison' MeansWhen a report mentions prior studies for comparison, it means the radiologist is checking whether something is new, unchanged, improving, or worsening.
- What 'Stable Findings' Mean on a Follow-Up ScanStable can be one of the most reassuring words in follow-up imaging. It usually means the thing being watched has not meaningfully changed.
Related scan guides
- Lung Biopsy (CT-Guided)A CT-Guided Lung Biopsy samples an abnormal spot or nodule found inside your lungs using real-time CT imaging for precision guidance, avoiding the need for major chest surgery.
- Thyroid Biopsy (FNA)A Thyroid Fine Needle Aspiration (FNA) is an extremely fast and simple procedure to check a nodule in your thyroid gland using ultrasound guidance — typically completed in under 20 minutes.
- Thyroid UltrasoundA Thyroid Ultrasound takes a close look at the butterfly-shaped gland located at the base of your neck. This test provides a real-time window into your thyroid gland to evaluate its size and check for any lumps or nodules.