Microdiscectomy is one of the most commonly performed operations in spine surgery — and one of the most reliable. If you've been diagnosed with a lumbar disc herniation causing sciatica, your surgeon may have discussed microdiscectomy as an option. Here's what the procedure involves, who it's for, and what to expect from recovery.
What Is a Herniated Disc?
Your spinal discs act as cushions between the vertebrae. Each disc has a tough outer ring (the annulus fibrosus) and a soft gel-like interior (the nucleus pulposus). When the outer ring tears — often from a combination of degeneration and a physical event like heavy lifting — the inner material can push out and press against a nerve root.
This nerve compression is what causes the characteristic pain of sciatica: sharp, burning, or shooting pain that travels from the low back into the buttock, leg, and sometimes the foot. Numbness, tingling, and weakness in the leg can also occur.
What Happens During a Microdiscectomy?
Microdiscectomy is performed through a small incision in the back, typically less than an inch in length. Using a surgical microscope for magnification and illumination, the surgeon gently moves the protective covering over the nerve and the nerve root itself out of the way, then removes the herniated disc fragment pressing on it.
The goal is not to remove the entire disc — just the fragment that is compressing the nerve. The remainder of the disc is left in place. The entire procedure typically takes one to two hours.
Who Is a Candidate for Microdiscectomy?
Microdiscectomy is most appropriate for patients who have:
- Lumbar disc herniation confirmed on MRI
- Significant leg pain (sciatica), numbness, or weakness corresponding to the affected nerve level
- Symptoms that have not adequately responded to 6–12 weeks of conservative care (physical therapy, medications, epidural steroid injection)
- No significant spinal instability or deformity that would require fusion
What Does Recovery Look Like?
Microdiscectomy is typically performed as an outpatient procedure or with an overnight hospital stay. Most patients experience significant relief of leg pain within days to weeks after surgery — often the relief is felt in the recovery room.
Patients can typically walk the day of surgery. Light activity — including walking and light household tasks — is encouraged early. Return to a desk job is often possible within 1–2 weeks. Return to physically demanding work typically takes 4–8 weeks depending on the specific demands.
How Successful Is Microdiscectomy?
Microdiscectomy for lumbar disc herniation with sciatica is among the most reliably effective operations in all of surgery. Clinical evidence consistently demonstrates that surgical treatment provides faster and more complete relief of leg pain than continued conservative management in appropriate candidates. Long-term outcomes are excellent for the majority of patients.
As with any surgical procedure, there are risks including infection, bleeding, nerve injury, and recurrent disc herniation at the same level. Your surgeon will discuss these risks in detail during your consultation.