Modic changes

Between adjacent vertebrae is an intervertebral disc, which acts as a cushion. The thin layer where the disc meets the vertebra is the vertebral endplate. Modic changes describe an appearance in which the tissue inside the vertebra (bone marrow) immediately next to this endplate shows a different signal than usual on MRI.

This classification was introduced in the 1980s and named after Modic, the radiologist who described it. It provides a shared language for recording appearances on imaging; it does not directly reveal what a person feels.

On MRI, the same tissue can appear bright or dark depending on the imaging sequence (T1 or T2). Modic changes are classified according to how the signal appears on these two sequences.

This is not a permanent stamp that remains unchanged for life once assigned. It is an imaging description whose appearance can change over time. Interpreting imaging signals is a specialist task that also takes imaging conditions and changes in surrounding structures into account.

Modic changes are sometimes observed on imaging in people with low back pain, and many studies have examined the relationship between the two findings. A 2018 systematic review brought together studies on the associations between Modic changes, low back pain, and limitations in daily activities, but the reported results differed across studies. Some studies reported associations between particular types and pain, but this did not establish a causal relationship in which the finding directly causes pain.

Structural changes in the spine are also commonly observed on MRI in people with no pain at all (Asymptomatic imaging findings). Modic changes are likewise interpreted in the context of current symptoms, activity levels, and examination findings rather than judged on the imaging finding alone. Imaging is an important source of reference information that adds context to the story.

Many people feel worried when they first encounter this finding in a report. The following perspectives may help you understand it.

• The term describes an appearance on imaging. “Bone marrow signal changes” describes features observed on imaging. It does not, by itself, establish how severe a condition is or how it will progress.
• Start by noting your symptoms. Recording when pain occurs, which positions feel more comfortable, and whether it spreads toward the legs can help connect imaging findings with the clinical examination.
• Feel free to ask a professional your questions. Asking, “How does this imaging finding relate to the symptoms I am feeling now?” can help you get a specific explanation.

These are generally useful approaches for people with low back discomfort. They are not measures that apply specifically or exclusively when Modic changes are found.

• Change position frequently. If you have been sitting for a long time, get up within an hour and take a gentle walk or straighten your back.
• Start with gentle walking. Walking naturally engages the muscles around the lower back without placing excessive strain on the spine.
• Try using your trunk and hip muscles within a pain-free range. Hip bridges and gentle core exercises are often used. Avoid movements that provoke pain and start within a comfortable range.
• Keep heavy objects as close to your body as possible when lifting. Bending your knees and hips together rather than bending only at the waist can reduce the load on your lower back.
• Pay attention to sleep and stress management, too. Pain can feel more intense when you are short on sleep or highly tense.

For more detailed information on managing low back pain, see Nonspecific low back pain.

• Weakness or reduced sensation in a leg
• Difficulty passing urine or stool, or loss of bladder or bowel control
• Severe low back pain accompanied by fever
• Sudden low back pain after a fall or impact
• Pain that persists at rest and at night and becomes progressively worse

Regardless of imaging findings, these signs may indicate a situation that requires prompt professional assessment, so let a professional know without delay.