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Minimally invasive lumbar fusion, by a UK BASS spinal surgeon.

MIS‑TLIF for one or two lumbar levels - a 2–3cm tubular approach, percutaneous pedicle screws and O‑arm navigation. Less muscle disruption than open TLIF, comparable long‑term fusion, one or two nights in hospital.

See indicative pricing
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Indicative pricing

What a private MIS‑TLIF costs in the UK.

Indicative ranges across UK private providers. NHS‑funded pathways are available at BASS‑accredited units.

In short

£18,000–£30,000, home in 1–2 nights.

Procedure Indicative range
MIS‑TLIF single‑level (self‑pay) £18,000–£30,000
MIS‑TLIF two‑level (self‑pay) £28,000–£45,000
Open TLIF (comparator) £15,000–£26,000
Lateral lumbar interbody fusion (XLIF) £20,000–£32,000
Anterior lumbar interbody fusion (ALIF) £22,000–£35,000
Consultant spinal opinion only £250–£450

Prices vary by hospital, by surgeon, by the number of levels operated, by whether O‑arm navigation is used, and by implant choice (PEEK vs titanium vs expandable cage).

The problem

The right surgeon, the right approach, the right levels.

Lumbar fusion is one of the most over‑ and under‑done operations in the UK - some backs get a bigger fusion than they need, others struggle for years without one.

  • Not sure fusion is needed?

    A decompression alone, an XLIF, or targeted rehab might do the job. We say so before you agree to a fusion.

  • Worried about a big open scar?

    MIS‑TLIF is done through a 2–3cm paramedian incision with percutaneous screws - less muscle damage, less pain, shorter stay.

  • Want it done properly?

    A named BASS spinal surgeon in a hospital equipped for O‑arm navigation - with a formal fusion check at twelve months.

When it helps

When MIS‑TLIF is the right operation.

The classical indications we see, plus the one red flag that means an emergency rather than an outpatient appointment.

  • Degenerative spondylolisthesis (grade I–II)

    A slipped vertebra with mechanical back pain and leg symptoms that has failed conservative care.

  • Isthmic spondylolisthesis

    A pars defect causing slip and radiculopathy - MIS‑TLIF restores foraminal height and stabilises the segment.

  • Recurrent disc herniation with instability

    A second or third herniation at the same level, with dynamic instability on flex‑ex films.

  • Adjacent segment disease

    A degenerate level next to a previous fusion, now symptomatic and structurally failing.

  • Low‑grade degenerative deformity

    A short lumbar curve or rotatory subluxation causing pain - a targeted one‑ or two‑level MIS‑TLIF often does the job.

  • Symptomatic instability post‑decompression

    Persistent mechanical pain and slip progression after a previous laminectomy or discectomy.

  • Revision fusion for pseudarthrosis

    A failed prior fusion with a non‑united segment on CT - MIS‑TLIF revises the interbody and adds fixation.

  • Red flag: cauda equina

    Saddle numbness, bladder or bowel disturbance, or bilateral leg weakness is an emergency - same‑day A&E, not a clinic booking.

Procedure options

MIS‑TLIF is not the only fusion.

What each option on the table actually involves - and which fits which back.

  • MIS‑TLIF single‑level

    Tubular retractor, unilateral facetectomy, interbody cage and percutaneous pedicle screws at one lumbar level.

  • MIS‑TLIF two‑level

    The same technique across two adjacent levels - longer OR time, one anaesthetic, one recovery.

  • Open TLIF (comparator)

    Traditional midline approach with muscle stripping. Still the right call for complex revisions or severe deformity.

  • XLIF / OLIF (lateral)

    A cage placed from the side through psoas. Larger footprint, good indirect decompression - often paired with percutaneous screws.

  • ALIF (anterior)

    A cage placed through the abdomen. Best restoration of disc height and lordosis at L5/S1, usually with a vascular surgeon co‑operating.

  • Decompression alone

    A microdiscectomy or laminectomy without fusion - the right answer when the pain is nerve compression, not instability.

  • Cage choice: PEEK, titanium, expandable

    PEEK is the workhorse, titanium encourages bony on‑growth, expandable cages restore height through a small window.

  • Consultation only

Safety and recovery

The benefits and the honest risks.

MIS‑TLIF is a well‑studied operation with clear advantages over open TLIF - but it has a learning curve, a longer OR time in early cases, and radiation exposure from fluoroscopy. Here is the balanced picture.

  • Less muscle disruption than open TLIF

    The Wiltse muscle‑splitting corridor and percutaneous screws mean less blood loss, less post‑op pain and a shorter hospital stay than a midline open fusion.

  • Comparable fusion rates

    At two to five years, MIS‑TLIF matches open TLIF on fusion rates and patient‑reported outcomes in most published series.

  • Dural tear (3–8%)

    A small tear in the sac around the nerves. Usually repaired at the time, occasionally needing a day of bed rest afterwards.

  • Nerve root injury (1–3%)

    A dysaesthesia or weakness in the exiting root, usually the L5. Most recover; a minority leave a lasting numb patch.

  • Pseudarthrosis (5–15% at 12 months)

    Failure of the bones to fuse across the cage. Smoking, osteoporosis and multi‑level surgery all raise the risk.

  • Cage subsidence and hardware issues

    The cage can sink into the endplate, or a screw can be malpositioned - the latter is much less common with navigation.

  • Adjacent segment disease

    A fused segment shifts load onto its neighbours. Over ten to fifteen years, some patients develop symptoms at the level above.

  • Infection, DVT and PE

    Low‑single‑digit rates for wound infection and venous thromboembolism, mitigated by antibiotics, stockings and early mobilisation.

  • Red flags after discharge

    New leg weakness, saddle numbness, bladder trouble, spreading redness or a fever are all reasons to call the team or A&E the same day.

Reading your operation note

Your operation note in four parts. Read the last one first.

Whichever levels were fused, the note the spinal surgeon sends you keeps to the same shape.

A UK consultant spinal surgeon reviewing a patient’s operation notes

A quiet reminder

Surgical language is precise and can read coldly - ask your care team to explain anything that is unclear.

Ask your care team to explain anything that is unclear.

  1. 01 Header

    Indication and levels operated

    Why the fusion was done - spondylolisthesis, adjacent segment disease, revision - and exactly which lumbar levels were addressed.

  2. 02 Technique

    Approach, cage and instrumentation

    Wiltse tubular approach, side of facetectomy, cage type (PEEK, titanium, expandable) and how the screws were placed (fluoroscopy or navigation).

  3. 03 Findings

    Decompression, disc and blood loss

    Notes on the discectomy, endplate preparation, any dural tear, estimated blood loss and screw accuracy on the post‑insertion scan.

  4. 04 Impression

    Rehab plan, lifting limits, fusion check

    Read this first: mobilisation plan, when you can drive, twelve‑week lifting limits, sport at six months, and when the fusion is checked.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Most UK insurers fund MIS‑TLIF when clinically indicated with prior authorisation.

Frequently asked

Everything we get asked about MIS‑TLIF.

Quick answers on candidacy, hospital stay, cost, risks, alternatives and getting back to work and sport.

  • What is MIS‑TLIF and how is it different from open TLIF?

    MIS‑TLIF is a minimally invasive transforaminal lumbar interbody fusion - the same operation as an open TLIF, but done through a 2–3cm paramedian tubular retractor with percutaneous pedicle screws instead of a long midline incision and muscle stripping. Fusion rates and long‑term outcomes are comparable; the trade is less blood loss, less pain and a shorter stay against a longer operating time and higher radiation dose.

  • Am I a candidate for MIS‑TLIF?

    The usual indications are grade I–II degenerative or isthmic spondylolisthesis, recurrent disc herniation with instability, adjacent segment disease, low‑grade deformity, symptomatic instability after a previous decompression, or revision of a failed fusion. Severe deformity, high‑grade slip or extensive multi‑level disease usually still favours an open approach.

  • How long does the operation take and how long am I in hospital?

    A single‑level MIS‑TLIF typically takes two to four hours. Most patients spend one to two nights in hospital, are walking with the physiotherapist on day one, and go home the following morning.

  • How much does MIS‑TLIF cost privately in the UK?

    Roughly £18,000–£30,000 for a single‑level self‑pay case and £28,000–£45,000 for two levels, inclusive of surgeon, anaesthetist, hospital, implants and standard follow‑up. NHS‑funded pathways are available at BASS‑accredited units.

  • When can I go back to work and to sport?

    Office and desk work usually resumes at two to six weeks. No heavy lifting (over 5–10kg) or repeated bending for twelve weeks. Running, gym and contact sport wait until about six months, once the fusion is confirmed on CT and standing X‑rays.

  • What are the main risks and complications?

    Dural tear (3–8%), transient nerve root injury (1–3%), pseudarthrosis or non‑union (5–15% at twelve months), cage subsidence, hardware malposition (reduced with O‑arm navigation), adjacent segment disease long‑term, infection, DVT or PE, incomplete decompression and chronic pain persistence.

  • What are the alternatives to MIS‑TLIF?

    A decompression alone if instability is not the issue, an XLIF or OLIF from the side, an ALIF from the front (especially at L5/S1), an open TLIF for complex cases, or continued non‑operative care with physiotherapy and targeted injections. A good spinal surgeon walks you through all of them.

  • When should I go to A&E rather than book a clinic?

    Saddle numbness, new bladder or bowel disturbance, bilateral leg weakness, a foot that will not lift, or a fever with spreading redness after surgery are all reasons for same‑day emergency assessment, not a clinic appointment.

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