An annular tear is a tear in the tough outer wall of a spinal disc. The word ‘tear’ is what scares people. The finding itself is often nothing special.
In more detail
- Each disc has a tough outer ring, the annulus fibrosus, around a gel-like center. An annular tear is a split in that outer ring. It may also be written as an annular fissure or a high-intensity zone.
- More and more radiologists use ‘fissure’ instead of ‘tear’ because ‘tear’ sounds like an injury that just happened. Many of these come with age and have been there for years.
- They are often found in people with no back pain at all.
What it means for you
On its own, an annular tear is not a reason for alarm. It is not usually a reason for surgery. It starts to matter when the pattern of your pain matches it. That is usually pain in the center of the low back, worse with sitting and bending forward. It also matters when disc material has come through the tear and is irritating a nerve root.
Remember the general rule. Findings like this one are common in people with no pain at all. They get more common with age. A finding on a report is not a diagnosis until someone has matched it to your symptoms and your exam. See understanding your MRI report.
Bring your scan and report in and we will go through it with you. Call us or request an appointment.
How common is it, and what does it predict?
The annulus is the tough outer ring of the disc. A tear in it is a flaw in that ring. Reports often call it an annular fissure or a high-intensity zone. The finding is common and shows up in many people without back pain. So it is not always the cause of symptoms. It is more likely to matter when the pain is deep, central and axial (in the spine itself). It is also more likely when the pain is clearly worse with sitting and loading, and when other sources have been ruled out. Most tears settle over months as the outer ring heals with scar tissue.
Common questions
Is an annular tear permanent?
The fissure itself often stays, but the pain associated with it usually settles. Here, symptoms and scan findings do not move together closely.
Does it need surgery?
Rarely. Treatment is aimed at the pain and the inflammation, not at how the disc looks.
Can it heal?
The outer annulus has a poor blood supply, so it heals slowly and often not fully. Again, that is not the same as still hurting. The ring heals with scar, not with its original tissue. Symptoms often settle over months.
Is an annular tear serious?
Usually not. It is common and often painless, and most settle over months. It matters when the pain pattern fits and other sources are ruled out.
Is a high-intensity zone the same thing?
It means the bright spot a fissure can make on MRI. It describes the same kind of flaw in the outer ring. Read it with the same care.
Sources
- Khan I et al. The lumbar high-intensity zone: 20 years on. Clinical radiology, 2014. PubMed 24613582
- Yang L et al. The correlation between the lumbar disc MRI high-intensity zone and discogenic low back pain: a systematic review and meta-analysis. Journal of orthopaedic surgery and research, 2023. PubMed 37805519
- Jha SC et al. Clinical Significance of High-intensity Zone for Discogenic Low Back Pain: A Review. The journal of medical investigation : JMI, 2016. PubMed 27040045
- Jha SC et al. High intensity zone in lumbar spine and its correlation with disc degeneration. The journal of medical investigation : JMI, 2017. PubMed 28373626
Hurt in an accident? Start here.
You do not need a lawyer, a police report or a referral to be seen. Bring your symptoms and we will work out the rest.
Monday–Friday, 8:00 a.m. – 4:00 p.m. Same-day appointments are often available for new accident and injury patients.