Vertebrogenic Pain Explained: Why Your MRI Might Show "Modic Changes"
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Published in The Ospina Orthopedic Blog ~ 8 min read ~ Last Updated: December 15, 2025
Introduction: A New Paradigm in Low Back Pain
For decades, the medical community's understanding of chronic low back pain (CLBP) has been dominated by the "discogenic" model. Patients are routinely told that their pain originates from a degenerated, herniated, or bulging disc pressing on a nerve. While this is true for many, there remains a significant population of chronic sufferers who fail to find relief despite undergoing microdiscectomies, laminectomies, or innumerable epidural steroid injections. For these patients, the persistent, deep, aching pain in the center of the low back remains a mystery.
Emerging research has identified a distinct and often overlooked source of this pain: the vertebral endplate. This condition, known as vertebrogenic pain, originates not from the soft disc or the spinal nerves, but from the vertebral bone itself. At Ospina Medical, we are at the forefront of diagnosing and treating this specific pathology, utilizing advanced imaging interpretation to identify the tell-tale sign of vertebrogenic pain: Modic changes.
The Anatomy of the Problem: The Vertebral Endplate
To understand vertebrogenic pain, one must look closely at the spinal anatomy. The vertebral endplate is a thin layer of cartilage and porous bone that serves as the interface between the vertebral body (the block of bone) and the intervertebral disc. It is a critical structure, acting as a gateway for nutrients to diffuse into the avascular disc.
The vertebral endplate is also highly innervated. It is supplied by the basivertebral nerve (BVN), a specific intraosseous nerve that enters the vertebra from the back and branches out like a tree toward the upper and lower endplates. In a healthy spine, these nerves are dormant. However, as the disc degenerates over time, the mechanical stress on the endplates increases. This can lead to micro-fractures, inflammation, and fissuring of the endplate surface.
In response to this damage, the basivertebral nerve proliferates. The density of pain-sensing nerve fibers in damaged endplates can increase dramatically. This process, combined with the presence of inflammatory chemicals, sensitizes the nerve, turning the vertebral body into a significant pain generator. Unlike sciatica, which shoots down the leg, vertebrogenic pain is typically experienced as a distinct, centralized low back pain that worsens with prolonged sitting or flexion.
Decoding the MRI: What Are Modic Changes?
The key to diagnosing vertebrogenic pain lies in magnetic resonance imaging (MRI). Specifically, physicians look for bone marrow lesions known as Modic changes. First described by Dr. Michael Modic in 1988, these changes represent histological alterations in the vertebral bone marrow adjacent to the endplate. They are classified into three types, with Type 1 and Type 2 being the most clinically relevant for pain.
Modic Type 1: The Active Inflammatory Phase
Modic Type 1 changes appear as a dark signal on T1-weighted images and a bright, high-intensity signal on T2-weighted images.
- Pathology: This signal pattern represents active bone marrow edema (swelling) and vascularized fibrous tissue. It indicates an acute or subacute inflammatory process occurring within the bone.
- Clinical Correlation: Type 1 changes are strongly associated with active, deep, persistent low back pain. The presence of marrow edema suggests that the basivertebral nerve is being bathed in inflammatory cytokines, leading to constant nociceptive (pain) signaling.
Modic Type 2: The Chronic Degenerative Phase
Modic Type 2 changes appear bright on both T1 and T2-weighted images.
- Pathology: This represents the replacement of normal red bone marrow with fatty marrow. It is a sign of chronic, long-standing degeneration and ischemia (lack of blood flow) of the endplate.
- Clinical Correlation: While considered more stable than Type 1, Type 2 changes are also strongly correlated with chronic low back pain and are often the result of the progression from Type 1.
The Udby Classification: A New Standard
Recent advancements in spine research have led to refined classification systems. The Udby Classification, proposed by Dr. Peter Udby, offers a more granular method of grading Modic changes based on their volume and extent. This system helps clinicians correlate the amount of endplate damage with the severity of patient symptoms, further refining the selection of candidates for treatment.
The Solution: Basivertebral Nerve Ablation (The Intracept® Procedure)
For patients with confirmed vertebrogenic pain—indicated by CLBP lasting more than six months, resistance to conservative care, and the presence of Modic Type 1 or 2 changes—Ospina Medical can help you better understand the Intracept® Procedure. This is an FDA-cleared, minimally invasive treatment that targets the root cause of the pain by ablating the basivertebral nerve.
The Procedure: Precision Radiofrequency Ablation
The Intracept procedure is performed under anesthesia or conscious sedation. Using real-time fluoroscopic (X-ray) guidance, the physician advances a specialized curved cannula through the pedicle of the vertebra and into the center of the vertebral body. This precise placement is crucial, as the target is the trunk of the basivertebral nerve before it branches to the endplates.
Once the probe is in position, a radiofrequency generator delivers controlled heat energy to the tip of the probe. This creates a precise zone of ablation, effectively coagulating and deactivating the basivertebral nerve. By interrupting the pathway, the pain signals from the inflamed endplates can no longer reach the central nervous system.
Clinical Evidence: Durability and Efficacy
The efficacy of Basivertebral Nerve Ablation (BVNA) has been established through high-quality Level 1 evidence, including two randomized controlled trials (RCTs): the SMART trial and the INTRACEPT trial.
- Long-Term Relief (5-Year Data): A pooled analysis of long-term follow-up data has demonstrated remarkable durability. At 5 years post-procedure, 66% of patients reported a greater than 50% reduction in pain, and 34% of patients reported being completely pain-free. This sustained relief is rare in chronic pain management, where treatments often lose efficacy over time.
- Functional Improvement: Patients showed clinically significant improvements in the Oswestry Disability Index (ODI), with a mean reduction of nearly 26 points at 5 years—far exceeding the minimal clinically important difference (MCID) of 10-15 points.
- Opioid Reduction: Long-term data also highlights a crucial public health benefit: a significant decrease in opioid consumption. Among patients taking opioids at baseline, there was a 74% reduction in active use for low back pain at long-term follow-up.
- Comparison to Standard Care: In the INTRACEPT trial, BVNA was compared to standard conservative care. The results were so superior in the ablation group that the independent Data Management Committee recommended halting enrollment early to offer the treatment to the standard care group—a testament to the procedure's effectiveness.
Are You a Candidate? Identifying Vertebrogenic Pain
Determining if the Intracept procedure is right for you begins with a specific diagnostic profile. The ideal candidate typically presents with:
- Chronic Low Back Pain: Pain present for at least 6 months.
- Failed Conservative Care: Lack of sustained relief from physical therapy, chiropractic care, and NSAIDs.
- Anterior Column Pain: Pain that is deep, aching, and worsened by flexion (bending forward) or sitting, distinct from the extension-based pain of facet arthritis.
- MRI Confirmation: The presence of Modic Type 1 or Type 2 changes at the L3 through S1 levels on an MRI.
At Ospina Medical, we perform a comprehensive evaluation that includes reviewing your MRI history with a "vertebrogenic lens." Many radiology reports may note Modic changes as incidental findings; we recognize them as potential key pain generators.
Conclusion: A Targeted Approach for Chronic Pain
Vertebrogenic pain represents a shift in how we understand and treat the spine. It moves the focus from the disc to the bone, offering a logical explanation for why so many disc-focused treatments fail. If you have been living with chronic lower back pain and feel like you have exhausted your options, your MRI might hold the clue to a diagnosis that requires a different approach.
Dr. Matthew Kohler specializes in identifying these subtle radiographic findings and either delivering or helping connect you to the right interventions. Do not settle for a life of managed pain when a targeted solution may be available. Contact Ospina Medical today to review your MRI and identify the true source of your pain.
A Riley Publication ~ Branded Thought Leadership by Riley Partners and Publications, Inc.
Medically Reviewed by: Matthew Kohler, MD