What is Microdiscectomy?

Microdiscectomy is spine surgery used to remove part of a herniated disc that is pressing on a nerve root. A herniated disc occurs when disc material pushes out from its normal position and irritates or compresses a nearby spinal nerve.

This procedure is most often discussed for lumbar disc herniation in the lower back, especially when the compressed nerve causes leg pain, numbness, tingling, or weakness. These symptoms are often called lumbar radiculopathy or sciatica.

The “micro” in microdiscectomy refers to the use of magnification, such as a microscope or other visualization technique, to help the surgeon work through a smaller exposure. Microdiscectomy is not the right treatment for every patient with back pain or every patient with a disc bulge on MRI. De Novo Brain & Spine evaluates adult patients in Stockbridge, Fayetteville, Atlanta, and surrounding communities to help determine whether microdiscectomy, non-surgical care, or another treatment plan may be appropriate.

Conditions This Treatment May Address

Microdiscectomy may be considered when a herniated disc is compressing a nerve root and causing symptoms that match the imaging findings. It is not designed to treat every cause of low back pain.

Conditions or situations that may lead to consideration of microdiscectomy include:

• Lumbar disc herniation
• Sciatica from nerve root compression
• Lumbar radiculopathy
• Leg pain, numbness, tingling, or weakness from a pinched nerve in the lower back
• Recurrent lumbar disc herniation in selected cases
• Severe nerve pain that does not improve with appropriate non-surgical care
• Progressive neurologic symptoms in selected cases
• Selected cervical or thoracic disc herniations only when the anatomy and surgical plan make this approach appropriate

Microdiscectomy is generally not used to treat isolated back pain without nerve compression, spinal instability, severe spinal stenosis, fracture, tumor, infection, or major deformity.

When This Treatment May Be Considered

Microdiscectomy may be considered when a herniated disc is pressing on a nerve and causing leg-dominant symptoms such as sciatica, numbness, tingling, or weakness. In many patients, symptoms improve over time without surgery, so non-surgical treatment is often tried first when there is no urgent neurologic problem.

Non-surgical care may include activity modification, medication, physical therapy, home exercise, and image-guided injections when appropriate. Surgery may be discussed when pain remains severe, function is limited, symptoms persist despite appropriate care, or neurologic weakness is worsening.

Microdiscectomy may be considered sooner when there is progressive weakness or symptoms that suggest serious nerve compression. Emergency evaluation is needed for symptoms of cauda equina syndrome, such as loss of bowel or bladder control or numbness in the groin or saddle area.

The decision depends on whether the symptoms, examination findings, and MRI findings all point to the same compressed nerve root.

How Doctors Determine Whether It May Be Appropriate

Doctors determine whether microdiscectomy may be appropriate by comparing the patient’s symptoms, neurologic examination, imaging findings, prior treatment history, and overall health.

Evaluation may include:

• Medical history and symptom pattern
• Review of leg pain, numbness, tingling, weakness, and functional limits
• Neurologic examination of strength, sensation, reflexes, walking, and straight leg raise findings
• MRI of the lumbar spine to evaluate disc herniation and nerve root compression
• X-rays when alignment, instability, arthritis, or prior surgery needs review
• CT scan when bone detail or complex anatomy needs clarification
• EMG/NCS testing when symptoms may come from a peripheral nerve problem rather than the spine
• Review of prior treatments, medications, injections, therapy, and symptom duration
• Review of medical risks, blood thinners, diabetes, nicotine use, prior surgery, and anesthesia risk

A disc bulge or herniation on MRI does not automatically mean that microdiscectomy is needed. The imaging must match the patient’s symptoms and examination.

What the Treatment Involves

Microdiscectomy is usually performed through an incision over the affected spinal level. The surgeon gently moves the muscles aside to reach the area where the nerve is being compressed.

Using magnification, the surgeon removes the disc fragment or disc material that is pressing on the nerve root. In some cases, a small amount of bone or ligament may also be removed to safely reach the herniated disc and free the nerve.

Microdiscectomy usually does not remove the entire disc. The goal is to remove the part of the disc that is compressing the nerve while preserving as much normal tissue as appropriate. The exact approach depends on the spinal level, size and location of the herniation, prior surgery, anatomy, and surgeon judgment.

Goals, Benefits, and Limitations

The main goal of microdiscectomy is to relieve pressure on a spinal nerve root caused by a herniated disc.

Potential benefits may include improvement in leg pain, numbness, tingling, or weakness related to nerve compression. Leg pain often improves more predictably than low back pain, but improvement is not guaranteed.

Microdiscectomy has important limitations. It does not treat every cause of back pain. It does not rebuild the disc. It does not prevent all future disc degeneration. It does not guarantee that symptoms will fully resolve, especially if the nerve has been irritated or compressed for a long time.

General risks may include infection, bleeding, nerve injury, spinal fluid leak, recurrent disc herniation, persistent pain, numbness, weakness, scar tissue, blood clots, or need for additional treatment. Some patients may later need another surgery if symptoms recur or if another spine problem develops.

Alternatives and Treatment Planning

Treatment planning is individualized. Microdiscectomy is one option among several possible treatments for lumbar disc herniation and radiculopathy.

Non-surgical options may include observation, medication, physical therapy, structured home exercise, activity modification, and epidural steroid injection when appropriate.

Other surgical options may include endoscopic discectomy, open discectomy, laminectomy, foraminotomy, or fusion in selected cases. Fusion is usually not needed for a simple first-time disc herniation, but it may be considered when there is instability, deformity, significant recurrent herniation, or another structural reason to stabilize the spine.

These treatments are not interchangeable. The best option depends on the location of the disc herniation, nerve compression pattern, symptom severity, neurologic findings, prior surgery, spinal stability, medical risks, and patient goals.

Recovery and Follow-Up

Recovery after microdiscectomy varies from person to person. It depends on the severity of nerve compression, symptom duration, overall health, activity level, prior surgery, and whether weakness or numbness was present before surgery.

Follow-up usually focuses on incision healing, leg pain, neurologic function, walking, activity progression, medication use, and whether physical therapy or rehabilitation guidance is needed. Some patients notice leg pain improvement early, while numbness or weakness may take longer and may not fully resolve.

Patients should follow the surgeon’s instructions about lifting, bending, twisting, driving, wound care, medication use, and return to work or activity. New or worsening neurologic symptoms should be reported promptly.

When to Seek Urgent Medical Care

Seek emergency medical care or call 911 for new or worsening leg weakness, loss of bowel or bladder control, numbness in the groin or saddle area, difficulty walking, or sudden severe neurologic changes.

Urgent evaluation is also important for severe back pain after trauma, fever with severe back pain, rapidly worsening leg symptoms, or new numbness or weakness that affects standing or walking.

After microdiscectomy, urgent evaluation is important for fever, worsening incision redness or drainage, severe worsening pain, new weakness, loss of bladder or bowel control, leg swelling, chest pain, trouble breathing, or symptoms the surgical team specifically warned about.

Frequently Asked Questions (FAQs):

What is microdiscectomy used for?

Microdiscectomy is used to remove selected herniated disc material that is pressing on a nerve root. It is most often considered for sciatica or lumbar radiculopathy caused by a herniated disc.

Is microdiscectomy for back pain or leg pain?

Microdiscectomy is usually more focused on nerve-related leg pain than isolated low back pain. It may help when a herniated disc is compressing a nerve root and causing leg pain, numbness, tingling, or weakness.

Does microdiscectomy remove the whole disc?

No. Microdiscectomy usually removes only the disc fragment or disc material pressing on the nerve. The goal is nerve decompression, not removal of the entire disc.

Is microdiscectomy the same as laminectomy?

No. Microdiscectomy removes herniated disc material that is pressing on a nerve. Laminectomy removes part of the bony arch of the vertebra to create more space in the spinal canal. Sometimes a small amount of bone may be removed during microdiscectomy to safely reach the disc, but the procedures are not the same.

Can a disc herniation come back after microdiscectomy?

Yes. A recurrent disc herniation can happen after microdiscectomy. The risk depends on the disc, activity, healing, anatomy, and other patient-specific factors. Recurrent symptoms should be evaluated with examination and imaging when appropriate.