What Do Modic Changes on MRI Mean?

Modic changes are changes seen on MRI in the bone marrow just above or below a spinal disc, next to the vertebral endplates. They are grouped as type 1, type 2 or type 3, depending on how the bone looks on different MRI sequences. They are often linked with disc wear, but whether they cause back pain is still debated.

This guide is for adults whose lumbar MRI report mentions Modic or endplate changes. It explains the wording and helps you prepare questions. It cannot tell you whether the finding explains your symptoms; that needs your history, an examination and your clinician's judgement.

The NHS advises calling emergency services or going to an emergency department if back pain comes with any of the symptoms below. Do not drive yourself.

Get an urgent same-day appointment if back pain comes with fever, feeling shivery or generally unwell, or severe pain that starts suddenly or worsens quickly. Fever matters with Modic type 1 in particular, because spine infection can look similar on some scans. MedlinePlus also lists a history of cancer, unexplained weight loss and pain that wakes you at night as reasons to contact a clinician promptly.

• Numbness or loss of feeling around the genitals or back passage.
• New trouble passing urine, or loss of control of the bladder or bowels.
• Pain, tingling, numbness or weakness in both legs.
• Back pain after a serious accident, or back pain with chest pain.

A radiologist reads the MRI images and sends a report to the doctor who requested the scan, according to RadiologyInfo. The Modic types in that report describe how the bone marrow next to the endplate appears on two common MRI sequences, called T1 and T2. A review by the International Society for the Study of the Lumbar Spine (ISSLS) summarises them as follows.

• Type 1: the marrow looks dark on T1 and bright on T2. It is linked with active inflammation and replacement of the normal marrow with fibrous, blood-vessel-rich tissue. It is sometimes called the oedema type.
• Type 2: the marrow looks bright on T1. It reflects fatty replacement of the marrow and is sometimes called the fatty type.
• Type 3: the marrow looks dark on both T1 and T2. It reflects hardened, sclerotic bone under the endplate.
• Mixed types, such as 1/2, can be reported when features of more than one type appear together.

Each vertebra has a thin endplate where it meets the disc. Modic changes sit in the bone right beside these endplates, usually at the same level as a worn disc. The ISSLS review notes they are associated with age and disc degeneration and are most common in the lower lumbar spine.

Modic type 1 is a specific pattern of oedema-like change next to a disc. Bone marrow oedema is a broader term with many possible causes, such as injury or stress on the bone. The SameCase guide on bone marrow oedema on MRI explains that wider term. The ISSLS review also notes Modic changes may be temporary or long-lasting stages, so a type can change on a later scan.

This is debated. The ISSLS review describes a positive association between Modic changes and low back pain, but notes that results vary a lot between studies, partly because of differences in scanners and how the changes are graded.

A 2023 systematic review in the Journal of Orthopaedics found inconsistent results across 15 studies, with no consistent pattern by type or spinal level. Its authors concluded that, for now, clinicians should not use the presence or absence of Modic changes to guide the management of low back pain. In short, Modic changes may matter for some people, but a report alone cannot show that they are the source of pain.

There is no single agreed treatment for Modic changes. Care is usually aimed at the back pain and how it affects daily life. General NHS advice for back pain includes staying active, avoiding long bed rest and doing back exercises and stretches, stopping if pain worsens.

Antibiotics have been studied because one theory links some type 1 changes to low-grade infection. In the AIM trial, published in the BMJ, three months of an antibiotic did not give a clinically important benefit over placebo in people with chronic low back pain and Modic changes, and side effects were more common. The authors concluded their results did not support antibiotic treatment. Do not start, stop or request a medicine based on a scan report; discuss any option with your clinician.

Bring the full MRI report and, if available, earlier scans so changes over time can be compared. These questions may help.

• Which type of Modic change is reported, and at which level?
• Does that level match where my pain is and how it behaves?
• Is there anything on the scan or in my symptoms that suggests infection or another cause, or is this a degenerative change?
• Are other findings at the same level, such as disc desiccation, a disc bulge or a Schmorl node, relevant to my symptoms?
• What treatment plan do you suggest, and how will we know if it is working?
• Would a repeat scan change the plan, and if so, when?

On SameCase, patients and verified doctors share de-identified cases. Seeing how others with Modic changes described their symptoms, which other findings appeared on their reports, and what their clinicians asked about may help you prepare clearer questions.

Similar cases cannot tell you what your scan means for you or predict your outcome. We suggest using them only as a starting point for a conversation with the clinician who knows your history and has examined you.