Facet Arthropathy
Facet arthropathy refers to degenerative changes involving the facet joints, the small paired joints located at the back of the spine that connect adjacent vertebrae and guide spinal movement. It is a common age-related process similar to arthritis in other joints of the body. Facet arthropathy may occur at any level of the spine and is frequently identified on spine imaging in adults. In some people it contributes to neck or back pain, while in others it causes no symptoms at all.
What is it?
Facet joints are small paired joints located at the back of the spine where adjacent vertebrae connect. These joints are lined with cartilage and enclosed within a joint capsule, similar to joints elsewhere in the body.
The facet joints help stabilize the spine, guide movement, and limit excessive motion.
Over time, the cartilage within these joints may wear down, leading to degenerative changes such as joint-space narrowing, cartilage loss, bone spur formation (osteophytes), joint enlargement, cyst formation, and thickening of nearby ligaments. These changes are collectively referred to as facet arthropathy or facet joint osteoarthritis.
Facet arthropathy most commonly develops as part of the normal aging process, but additional factors may accelerate degeneration, including repetitive heavy lifting, prior spinal injury, obesity, scoliosis, abnormal spinal alignment, spondylolisthesis, and degenerative disc disease.
As spinal discs lose height with aging, more stress may be transferred onto the facet joints, further accelerating wear and tear.
Facet arthropathy can occur throughout the spine but is especially common in the lumbar spine, followed by the cervical spine.
Symptoms vary considerably. Many people with facet arthropathy seen on imaging have no related symptoms. When symptoms occur, they are often described as aching pain, stiffness, reduced flexibility, or discomfort that worsens with prolonged standing, twisting, leaning backward, or repetitive movement.
Severe enlargement of the facet joints may contribute to spinal stenosis or neural foraminal stenosis, potentially leading to nerve compression symptoms such as radiating pain, numbness, tingling, or weakness in the arms or legs.
MRI of the spine is the preferred imaging test for evaluating facet arthropathy because it provides detailed visualization of the joints, cartilage, discs, ligaments, spinal canal, and nerves. MRI can also identify associated inflammation, nerve compression, synovial cysts, and degenerative changes.
CT is particularly useful for detailed assessment of bony structures including osteophytes, facet enlargement, and joint degeneration.
X-rays may show spinal alignment changes, arthritis, disc-space narrowing, and instability, especially on flexion-extension views.
In selected cases, image-guided diagnostic facet injections may help determine whether the facet joints are the primary source of pain.
Important to Know
Facet arthropathy is extremely common and is often part of the normal aging process.
Because many imaging findings are also present in people without symptoms, imaging results are interpreted together with symptoms and physical examination findings rather than in isolation.
Most symptomatic patients improve with conservative care including physical therapy, posture correction, stretching, exercise, weight management, ergonomic adjustments, and anti-inflammatory medications.
Image-guided facet joint injections, medial branch nerve blocks, or radiofrequency ablation procedures may help reduce pain in selected patients.
Surgery is generally reserved for patients with significant nerve compression, spinal instability, or persistent disabling symptoms that do not improve with non-surgical treatment.
Maintaining core strength, flexibility, proper posture, and a healthy weight may help reduce stress on the facet joints and support long-term spinal health.
Follow-up imaging may be recommended when symptoms worsen or if interventional or surgical treatment is being considered.
Red flag symptoms include sudden severe weakness, progressive numbness, gait or balance difficulty, loss of bowel or bladder control, unexplained weight loss, fever with back pain, or severe pain after trauma. These symptoms require prompt medical evaluation because they may indicate a more serious spinal or neurological condition.