Cervical and Lumbar Disc Herniations

What Patients and Referring Providers Need to Know

By Joseph H. Miller, MD, FAANS

Advanced Neurosurgery Associates  •  Northside Hospital Gwinnett

Few phrases on a spine MRI report cause more immediate concern than “disc herniation.” Patients often arrive fearing permanent nerve damage or inevitable surgery. Referring colleagues want practical guidance on urgency, imaging correlation, and when escalation makes sense. In reality, disc herniation is one of the most common spinal conditions I evaluate. The majority of patients improve substantially with time and non-operative care, and when surgery is appropriate, modern minimally invasive techniques are very effective.

My approach is consistent with the rest of my practice: start with a careful history and examination, exhaust appropriate conservative options, and reserve surgery for those who truly need it—progressive neurologic deficit, cauda equina syndrome, myelopathy, or severe, refractory radicular pain after a thoughtful trial of non-surgical treatment.

Disc herniation often occurs on a background of disc degeneration (the continuum we discussed in the Degenerative Disc Disease article), but the acute displacement of nuclear material (the center of the disc) is what produces the sudden radicular symptoms many patients experience.

What Is a Disc Herniation?

The intervertebral disc sits between the vertebrae and acts as a shock absorber and flexible spacer. It has two main parts: a tough, layered outer ring called the annulus fibrosus and a softer, gel-like center called the nucleus pulposus.

A herniation occurs when material from the nucleus pushes through a tear or defect in the annulus. Depending on how much material exits and whether it remains connected, we describe:

  • Protrusion (contained, broad-based)
  • Extrusion (more focal, nucleus beyond the annulus but continuous)
  • Sequestration (free fragment)

These morphological distinctions are clinically relevant because sequestered and extruded fragments show the highest rates of spontaneous regression (approximately 96% and 70%, respectively, in systematic reviews).

Most symptomatic herniations occur in the lumbar spine, particularly at L4-5 and L5-S1, where they typically compress a single nerve root and produce radiculopathy (often called sciatica). In the cervical spine the most common levels are C5-6 and C6-7. Because the spinal cord is present in the neck, a larger central herniation can also produce myelopathy—cord compression with more serious implications for gait, hand function, and long-term neurologic health.

Figure 1. Cross-sectional anatomy of a normal intervertebral disc versus a herniated disc (nucleus pulposus displacing through the annulus and compressing a nerve root).

Who Gets It: Onset, Demographics, and Risk Factors

Symptomatic lumbar disc herniation peaks in adults aged 30 to 50, with a male predominance of roughly 2:1 in many series. More than 95% of symptomatic lumbar herniations in this age group occur at L4-5 or L5-S1. Cervical disc herniation and radiculopathy tend to present somewhat later, peaking in the 50s and 60s, with C5-6 and C6-7 the most frequent levels (together accounting for the large majority of cervical cases).

Risk factors include smoking, higher body mass index, repetitive occupational loading (forward bending and heavy lifting), genetics, and a history of prior lumbar herniation. Many patients, however, have no dramatic precipitating event—symptoms can begin after a simple bend or even spontaneously.

The Numbers Behind Disc Herniation

The lifetime risk of symptomatic lumbar disc herniation is estimated at 1–3%. Annual incidence estimates vary with case definition, but clinically significant radiculopathy occurs in the range of several cases per thousand adults per year. Cervical radiculopathy incidence is lower—approximately 0.8–1.8 per 1,000 person-years.

MRI studies of asymptomatic adults reveal disc herniations in 20–30% or more, rising with age. This is why we never operate on the MRI picture alone.

Fortunately, the natural history is favorable. Systematic reviews show spontaneous regression of the herniation itself in approximately 70% of cases overall, rising to roughly 70% for extrusions and 96% for sequestrations. Clinically, 80–90% of patients with lumbar disc herniation and radiculopathy improve substantially with nonoperative care, often within 6–12 weeks. Cervical radiculopathy follows a similar pattern, with 75–90% improving without surgery.

Recognizing the Symptoms

Lumbar Disc Herniation

Most patients present with a combination of low-back pain and radiating leg pain. Classically the leg pain predominates and follows a dermatomal pattern:

  • L4: anterior thigh, medial leg
  • L5: lateral leg, dorsum of the foot, great toe
  • S1: posterior leg, lateral foot, sole

Patients often describe sharp, shooting, or burning pain aggravated by sitting, coughing, or sneezing. Numbness, tingling, or weakness in the corresponding myotome may be present. A positive straight-leg-raise test is highly suggestive.

Cervical Disc Herniation

Neck pain may radiate into the shoulder blade or down the arm in a dermatomal distribution (C6: thumb and index finger; C7: middle finger; C8: ring and little fingers). Spurling’s test can reproduce symptoms (putting your ear on shoulder essentially causes pain to go down your arm). Weakness and/or numbness in the arm can also occur. When the spinal cord itself is compressed, patients may notice unsteady gait, loss of fine motor control in the hands, or hyperreflexia. In summary, cervical disc herniations can cause neck pain and the following symptoms in the arm:

  • Pain
  • Weakness
  • Numbness

Symptoms That Warrant Urgent Evaluation

These situations change the timeline—I evaluate them promptly:

  • Progressive motor weakness (e.g., worsening foot drop or hand weakness)
  • Signs of cauda equina syndrome: saddle anesthesia, new bowel or bladder dysfunction, bilateral leg symptoms
  • Signs of cervical myelopathy: unsteady gait, loss of fine motor control in the hands, hyperreflexia, or pathologic reflexes such as Hoffmann’s sign
  • Intractable pain unresponsive to oral medications

 

 

Figure 2. Sagittal views illustrating common sites of disc herniation: lumbar (L5-S1 compressing the S1 nerve root) and cervical (C6-C7 compressing the C7 nerve root). Note the presence of the spinal cord in the cervical region.

How We Diagnose Disc Herniation

Diagnosis begins with a careful history and neurologic examination. For lumbar disease I pay particular attention to the distribution of leg pain, the straight-leg-raise test, motor strength (especially ankle dorsiflexion, great-toe extension, and plantarflexion), reflexes, and sensation. For cervical disease, Spurling’s maneuver, upper-extremity strength and reflexes, and careful assessment for myelopathic signs (Hoffmann’s, hyperreflexia, gait disturbance, hand clumsiness) are essential.

MRI is the imaging study of choice when symptoms persist beyond a few weeks, when neurologic deficits are present, or when red-flag features raise concern for other pathology. Consistent with appropriateness criteria, I do not routinely obtain MRI in the first 4–6 weeks of uncomplicated radiculopathy without neurologic deficit or red flags—the majority improve, and early imaging can generate unnecessary anxiety. Plain radiographs help assess alignment and rule out instability or other bony issues. CT or CT myelography is useful when MRI is contraindicated. EMG/nerve conduction studies can help confirm radiculopathy or differentiate from peripheral neuropathy when the clinical picture is unclear.

The single most important principle remains clinical-imaging correlation. A herniation that does not match the patient’s symptoms and examination is not the problem we treat. Treating an MRI report in isolation is one of the most common paths to unnecessary procedures.

Treatment: Why We Start Conservative

Because the natural history is favorable, we begin with non-operative care for the majority of patients. This includes physical therapy emphasizing core stabilization and initiating a regular strength training plan aimed at the core musculature. Movement is key and bedrest makes many patients worse in the long run. Short interval of anti-inflammatories are often necessary though we try to limit the use of these unless necessary. NSAIDs can be hard on the gut and affect the gut microbiome. Patients often notice meaningful improvement within 6–12 weeks. Smoking cessation and weight management support recovery and reduce recurrence risk.

Epidural steroid injections can provide meaningful short-term relief in a proportion of patients and may help some avoid or delay surgery.

When Surgery Enters the Conversation

Surgery is considered when symptoms remain disabling after a reasonable trial of conservative care (typically 6–12 weeks), when there is progressive neurologic deficit, or in the presence of cauda equina syndrome or significant myelopathy.

The landmark Spine Patient Outcomes Research Trial (SPORT) demonstrated that both surgical and nonoperative patients improve over time. Surgery offers faster and often greater relief of leg pain and disability for those with persistent symptoms beyond six weeks, particularly in as-treated analyses. Long-term outcomes converge for many, underscoring that the decision is highly individualized.

Lumbar herniation: The most common procedure is a microdiscectomy—a targeted removal of the offending disc fragment through a small incision, typically performed as an outpatient or short-stay procedure. Leg-pain relief rates of 80–95% are achieved in appropriately selected patients. Recurrence rates are typically ~5-10%.

Cervical herniation: Anterior cervical discectomy and fusion (ACDF) remains highly reliable for radiculopathy, with excellent arm-pain improvement. Cervical disc arthroplasty is an excellent motion-preserving option in carefully selected younger patients without significant spondylosis or facet disease. Posterior foraminotomy can address certain posterolateral herniations while preserving motion and avoiding fusion (though this is not commonly recommended as a first line treatment).

In every case the goal is the least invasive procedure that safely decompresses the neural elements and addresses the patient’s primary complaint. For pure radiculopathy the outcomes are excellent; when myelopathy is present the primary goal is often to halt progression rather than guarantee full recovery of already-established deficits.

A Note to Referring Providers and Patients

A referral to my office does not default to a surgical recommendation. I am happy to evaluate, confirm the diagnosis, help refine a conservative plan, or provide a second opinion for patients who may have been recommended surgery elsewhere. Early referral is especially valuable for progressive deficits or red-flag symptoms. I also welcome discussion of complex multilevel cases or patients seeking motion-preserving options such as cervical disc replacement.

If you have questions about a disc herniation diagnosis or would like to discuss a patient, please reach out to our office.

Joseph H. Miller, MD FAANS

Advanced Neurosurgery Associates

2200 Medical Center Blvd, Suite 350

Lawrenceville, GA 30046

Phone: 678-312-2700

Selected Sources

Weinstein JN, et al. Surgical vs nonoperative treatment for lumbar disk herniation: the Spine Patient Outcomes Research Trial (SPORT). JAMA. 2006;296(20):2441-2450. (and subsequent long-term reports in Spine)

North American Spine Society. An evidence-based clinical guideline for the diagnosis and treatment of lumbar disc herniation with radiculopathy. Spine J. 2014;14(1):180-191.

North American Spine Society. An evidence-based clinical guideline for the diagnosis and treatment of cervical radiculopathy from degenerative disorders. Spine J. 2011;11(1):64-72.

Chiu CC, et al. The probability of spontaneous regression of lumbar herniated disc: a systematic review. Clin Rehabil. 2015;29(2):184-195.

Hincapié CA, et al. Incidence of and risk factors for lumbar disc herniation with radiculopathy in adults: a systematic review. Eur Spine J. 2025;34:263-294.

American Association of Neurological Surgeons. Herniated Disc patient information.

WFNS Spine Committee recommendations on lumbar disc herniation epidemiology, diagnosis, and management.

Additional supporting literature from Journal of Neurosurgery: Spine, Spine, and high-quality systematic reviews on natural history and treatment outcomes.

This article is intended for educational purposes and does not constitute individualized medical advice. Treatment decisions should be made in consultation with a qualified physician after appropriate evaluation.