What Is Microlumbar Discectomy & Who May Need It?
Microlumbar discectomy (MLD), also called lumbar microdiscectomy, microdiscectomy, or microscopic lumbar discectomy, is an operation to remove the herniated (slipped) part of a lumbar disc that is pressing on a nerve. It is performed through a small incision using an operating microscope, and it is the most widely used operation for sciatica caused by a disc herniation.
The discs between the vertebrae act as cushions. Each has a tough outer ring and a softer centre. When the outer ring tears, part of the centre can push out — a disc herniation, commonly called a slipped disc (ICD-10 M51.1). If that fragment presses on a nerve root in the lower back, it causes pain, tingling, or numbness that travels down the leg. This is sciatica (lumbar radiculopathy, ICD-10 M54.3).
In a microlumbar discectomy, the surgeon reaches the disc through a small incision in the middle of the lower back. Working under an operating microscope, the surgeon gently moves the nerve root aside and removes only the herniated fragment that is compressing it. The rest of the disc, and the bones, joints, and ligaments that keep the spine stable, are left in place.
Microlumbar discectomy treats leg pain caused by a disc pressing on a nerve. It is designed to relieve sciatica; it is not an operation for back pain alone, and it does not "replace" or "fix" the whole disc. For educational purposes only; individual outcomes vary and this is not a substitute for personal medical advice.
Why the Operating Microscope Matters
The nerve root and the protective sac around the nerves (the dura) lie millimetres from the disc fragment. The operating microscope makes this small working space safer and more precise:
A magnified, brightly lit, three-dimensional view of the nerve, the dura, and the small blood vessels around them.
Fine control of instruments allows the nerve root to be moved aside gently while the fragment is removed.
Because the surgeon can see clearly through a small window, less muscle needs to be moved and less bone removed.
Who May Need Microlumbar Discectomy?
Microlumbar discectomy is considered for a slipped disc pressing on a nerve root and causing sciatica, when symptoms, examination, and MRI match and disabling leg pain has not settled with about 6–12 weeks of non-surgical care — or sooner if weakness is worsening. Those pages explain the condition, its diagnosis, and non-surgical treatment.
New difficulty passing urine or controlling the bladder or bowel, numbness around the genitals or buttocks ("saddle" numbness), or rapidly worsening weakness in the legs can indicate cauda equina syndrome — a surgical emergency. Go to the nearest hospital emergency department without delay.
When Microlumbar Discectomy Is Usually Not the Answer
MLD is unlikely to help back pain without leg symptoms, or an MRI finding that does not match the symptoms. When the main problem is instability, spondylolisthesis, or narrowing at several levels, decompression or fusion may be more appropriate.
Before Surgery & The Procedure Step by Step
Before Surgery
- MRI review: To confirm the level and side of the herniation and that it matches your symptoms.
- Medical fitness: Blood tests and, where needed, heart and lung assessment; control of blood sugar in diabetes.
- Medicines: Blood thinners and some other medicines may need to be stopped or adjusted before surgery, only as advised by your doctors.
- Smoking: Stopping before surgery helps wound and disc healing.
- Anaesthesia assessment: A full discussion of the expected benefits, risks, and alternatives before you give consent.
The Procedure: Step by Step
For educational purposes only; steps vary with the individual patient:
- 1
Anaesthesia and positioning: The operation is usually done under general anaesthesia. You lie face-down on a padded frame that keeps pressure off the abdomen.
- 2
Confirming the level: An X-ray taken in the operating room confirms the correct disc level before the incision is made.
- 3
Small incision and access: A skin incision of about 1–1.5 cm is made in the midline. The back muscles are gently moved aside rather than cut.
- 4
Small bone window: Under the microscope, a small amount of bone and the ligament covering the nerves (ligamentum flavum) are removed to reach the nerve root.
- 5
Removing the fragment: The nerve root is gently moved aside and the herniated fragment is removed. The surgeon checks that the nerve is free along its course.
- 6
Closure: Bleeding is controlled, and the muscles and skin are closed in layers. A single-level operation commonly takes about an hour.
Microlumbar Discectomy vs Other Options
For educational purposes only; individual outcomes vary across non-surgical and surgical treatment options:
How It Works: Medicines, physiotherapy, activity modification, time. Typically Suited For: Most patients in the first 6–12 weeks without warning signs. Limitations: Slower relief of leg pain; some patients still need surgery.
How It Works: Steroid and local anaesthetic placed near the irritated nerve. Typically Suited For: Short-term relief while the herniation settles, or when surgery is not wanted. Limitations: Effect is often temporary; does not remove the fragment.
How It Works: Fragment removed through a small incision under the operating microscope. Typically Suited For: A wide range of lumbar disc herniations; long-established standard operation. Limitations: Surgery and anaesthesia risks; recurrence possible.
How It Works: Fragment removed through an endoscope via an incision under about 1 cm (Read about endoscopic discectomy). Typically Suited For: Selected herniations, depending on position and anatomy. Limitations: Not suitable for every herniation; technique-dependent.
How It Works: Disc removed and the segment fixed with screws and a spacer (Read about TLIF). Typically Suited For: Instability, spondylolisthesis, or repeated recurrence with back pain. Limitations: Larger operation; longer recovery; not needed for a simple herniation.
Microlumbar discectomy and endoscopic discectomy remove the same problem — a disc fragment pressing on a nerve — by different routes, while fusion addresses a different problem altogether. The choice should follow the anatomy of your herniation, your own circumstances — your health, your work, and what matters to you in recovery — and the advice of your neurosurgeon after examining you and reviewing your MRI.
Risks to Discuss Before Surgery
Microlumbar discectomy is a commonly performed and well-established operation, but it is still surgery on the nerves. Risks include:
- !
Recurrent disc herniation: A new fragment can herniate at the same level (see Recovery & Recurrence).
- !
Tear in the nerve covering (dural tear): May cause a cerebrospinal fluid (CSF) leak. It is usually repaired during the same operation.
- !
Nerve root injury: Causing weakness or numbness — uncommon, and sometimes permanent.
- !
Bleeding or a blood collection: Near the nerves (epidural haematoma) — rare, but may need urgent treatment.
- !
Wound infection: Or, rarely, infection of the disc space.
- !
Persisting leg pain or numbness: Particularly if the nerve was compressed for a long time.
- !
General surgical risks: Blood clots and the general risks of anaesthesia.
Your own risk depends on your age, general health, the level and type of herniation, and any previous spine surgery. These are discussed individually, with you and your family, before you decide.
Recovery & Recurrence
General guidance only; your surgical team will give advice specific to you:
Walking with help, usually by the day after surgery. Many patients notice the radiating leg pain is less; some have temporary soreness, numbness, or tingling. Discharge is usually within one to two days, depending on recovery.
Regular short walks. Avoid bending, lifting, and twisting. Mild incision soreness is expected. Desk-based work may be possible towards the end of this period, as advised.
Gradual return to daily activities. Physiotherapy for core and back strength often begins. Driving is resumed when you can sit comfortably and react safely, after discussing it with your surgeon.
Heavier physical work, lifting, and sport are reintroduced gradually, depending on progress and the nature of your work.
Contact the team promptly if leg pain returns suddenly, if you develop new weakness, fever, wound redness or discharge, a clear fluid leak from the wound, or any bladder or bowel change. Numbness and weakness often take longer to improve than pain.
Recurrence and How to Reduce the Risk
A new herniation at the same level can occur after any type of discectomy, because the disc that remains is still a disc that has torn once. It is most likely in the first year. In a large randomised trial published in the BMJ in 2022, 6% of patients needed repeat surgery within one year of microdiscectomy. A recurrence can usually be treated — sometimes without surgery, sometimes with a further discectomy.
- Early precautions: Follow the lifting and bending restrictions in the first six weeks.
- Rehabilitation: Complete the physiotherapy programme, especially core-strengthening exercises.
- Lifestyle habits: Keep to a healthy weight, stay active with low-impact exercise such as walking or swimming, and do not smoke.
- Spinal mechanics: Use good lifting technique and workplace ergonomics over the long term.
Questions to Ask Your Spine Surgeon or Neurosurgeon
These are the questions patients most often search for before slipped disc surgery. Asking them at your consultation helps you understand whether microdiscectomy is right for you:
- 1
Do I really need surgery for my slipped disc, or can I wait? Have I tried non-surgical treatment long enough, or is there weakness or another reason not to wait?
- 2
Am I a candidate for microdiscectomy? Does the herniation on my MRI match the leg pain and numbness I am feeling?
- 3
Is microdiscectomy safe for me? What are the risks and complications in my case, given my age, health, and the level of the herniation?
- 4
Microdiscectomy or endoscopic discectomy — which is better for my herniation? Why is one approach recommended over the other for me?
- 5
Do I need a fusion, or will a discectomy be enough? Is there any instability on my X-rays?
- 6
What results can I realistically expect? How much improvement in leg pain, back pain, numbness, and weakness is likely, and over what time?
- 7
How long is recovery after microdiscectomy? When can I walk, drive, return to my particular work, and resume exercise or sport?
- 8
Can the slipped disc come back after surgery? What is the chance of recurrence, and what would be done if it happens?
- 9
Hospital stay & rehabilitation: How many days will I stay in hospital, and what physiotherapy will I need afterwards?
- 10
What will the total cost be, and what does it include? Ask for a written estimate covering surgeon, hospital, consumables, and follow-up.
Spine surgery is usually a planned decision rather than an emergency. Seeking a second opinion from a qualified spine surgeon or neurosurgeon before deciding is entirely appropriate — particularly if a fusion has been suggested for a simple disc herniation.
Frequently Asked Questions
General information only. Please consult a qualified spine surgeon for advice about your situation.
Microlumbar discectomy, also called lumbar microdiscectomy, is an operation that removes the herniated part of a lumbar disc pressing on a nerve root. It is performed through a small incision of about 1–1.5 cm using an operating microscope, and it leaves the rest of the disc and the stabilising structures of the spine in place.
Microdiscectomy is a common, well-established spine operation performed through a small incision, usually under general anaesthesia, and a single level commonly takes about an hour. It is smaller than a fusion operation, but it is still surgery on the nerves and carries risks that should be discussed beforehand.
Neither is better for every patient. Both remove the disc fragment pressing on the nerve, by different routes. Microdiscectomy suits a wide range of herniations and is the long-established standard; endoscopic discectomy suits selected herniations. The choice depends on where the herniation lies, the patient's anatomy and circumstances, and the neurosurgeon's assessment.
Most patients are walking by the day after surgery and go home within one to two days. The length of stay depends on how quickly you are walking comfortably, your general health, and the hospital's protocol.
Desk-based work is often possible within about two weeks. Gradual return to daily activities and physiotherapy follow over the next few weeks. Physically demanding work, heavy lifting, and sport are usually reintroduced after about six weeks, guided by the surgical team.
Yes. A recurrent herniation at the same level can occur after any discectomy, most often within the first year. In a 2022 randomised trial in the BMJ, 6% of patients needed repeat surgery within one year after microdiscectomy. Recurrence can usually be treated, sometimes with a further operation.
Microdiscectomy is designed to relieve leg pain caused by a disc pressing on a nerve. Back pain may also improve, but it responds less predictably than leg pain. Back pain alone, without leg symptoms, is usually not a reason for this operation.
Microlumbar discectomy is performed in Pune by trained neurosurgeons & spine surgeons. Dr Jaydev Panchawagh—MBBS (B.J. Medical College, Pune), MS in General Surgery (KEM Hospital, Pune), and MCh in Neurosurgery (Seth GS Medical College and KEM Hospital, Mumbai)—is a consultant neurosurgeon in Pune (102, Bhagyatara Society, Erandwane, Pune, Maharashtra 411004; Tel: +91-9011333841) with 27 years of neurosurgical practice and 3,000+ spine surgeries who offers this procedure after individual assessment of symptoms, examination, and MRI.
