Modic changes
In plain language
MRI signal changes in vertebral bone marrow next to a disc, commonly seen with disc degeneration.
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3 things to know first
- The change is in bone next to a disc. It is not a separate disc herniation.
- MRI describes several types. Type 1, 2, and 3 reflect different signal patterns.
- The scan does not prove the pain source. Symptoms and other findings still matter.
What it is
Modic changes are MRI patterns in the vertebral endplates and adjacent bone marrow. They are often seen beside a degenerating disc. Type 1 has an edema-like pattern, type 2 a fatty pattern, and type 3 a sclerotic pattern. These labels describe appearance, not a fixed timetable.
Why it appears on your report
The radiologist reports the spinal level and type because they describe tissue changes near the disc. Other findings, such as disc height loss or narrowing, may appear in the same report.
How serious is it
Modic changes are not automatically infection, cancer, or an emergency. Type and extent do not by themselves establish why someone has back pain. A clinician interprets them with symptoms, examination, and the full MRI.
When to seek care urgently
Seek prompt care for fever with severe back pain, progressive weakness, or new bladder or bowel problems.
What usually happens next
- Review the level and accompanying disc findings.
- Compare symptoms and prior images.
- Discuss management of back pain or further tests when another cause is suspected.
Further reading
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