Spinal AVM Surgery and Spinal Dural AV Fistula Treatment

What Is a Spinal AVM?

A spinal arteriovenous malformation (spinal AVM) is an abnormal short circuit between arteries and veins in or around the spinal cord. High-pressure blood skips the tiny capillaries and floods the veins, so the cord can no longer drain well.

In practice, doctors use "spinal AVM" as an umbrella term. It covers a tangle of vessels inside the cord and also a single small leak in the cord's covering, the spinal dural arteriovenous fistula (spinal dAVF).

Both types also harm the cord in two ways. First, blood pools and the tissue swells for lack of oxygen. Second, a thin vessel wall can tear and bleed.

At a Glance

• Most common typeSpinal dural AV fistula, mostly in men over 50
• Typical startLeg weakness and bladder trouble that creep up over months
• Sudden formSevere back pain and weakness from a bleed, often in younger people
• Key testSpinal catheter angiography after an MRI
• Main treatmentsMicrosurgery, embolization or both together
• GoalClose the short circuit for good and stop the decline

Where Are You in Your Decision?

Pick the line that sounds most like you. Each one then opens the matching part of this guide.

1. 01My legs and bladder keep getting worseSlow and sudden symptoms, and what they mean→
2. 02Doctors treated me for something elseWhy spinal AVMs pass for stenosis, disc or myelitis→
3. 03I was told I have a spinal fistula or AVMThe types and how each one behaves→
4. 04I must choose surgery or embolizationWhat decides the route for your case→
5. 05I want to know if I will walk betterRecovery time and what usually improves→
6. 06I am planning treatment abroadRecords to bring, length of stay and flights→

Types of Spinal Vascular Malformations

Doctors sort spinal AVMs into four main types by location and blood flow. The type matters too, because it predicts how fast symptoms start, the bleeding risk and the best treatment.

A cavernoma differs from an AVM, since its blood flows slowly. So our cavernoma guide covers it separately.

In fact, the same kind of leak can also form in the coverings of the brain. That form, with its very different symptoms, appears in our dural AV fistula guide.

Spinal AVM Symptoms: Slow or Sudden?

Symptoms of a spinal AVM either creep up or strike at once, and the type decides which. A fistula usually worsens over months, while an AVM inside the cord often announces itself with a bleed.

Questions about symptoms

When to See a Doctor

Slow symptoms need a prompt, planned visit, because every month of congestion can cost function. Sudden symptoms, in contrast, need emergency care the same day.

A spinal cord bleed needs local emergency care first. So never wait to see if it settles, and do not plan a trip abroad before that care.

Why Spinal AVMs Often Get Diagnosed Late

A spinal AVM mimics much more common spine problems, so the true cause can hide for months. In addition, older people often have wear on their MRI that takes the blame.

A Warning About Steroids

For example, some people with a fistula get high-dose steroids for suspected myelitis. Reports show that symptoms can then worsen quickly. So an unexplained bright signal in the cord needs the right diagnosis before treatment.

Blood-rich tumors such as a hemangioblastoma can also look vascular. For this reason, the team rules out a tumor first.

How Doctors Diagnose a Spinal AVM

Diagnosis starts with a nerve exam and ends with a catheter angiogram that maps every vessel. Each step narrows the search for the next one.

First, for the angiogram, an interventional radiologist guides a thin catheter from the groin artery. Then each artery that feeds the cord fills with dye, one by one. This can take a few hours, because a fistula may hide in one small vessel.

Spinal AVM Treatment Options Compared

Spinal AVM treatment aims to close the abnormal connection for good and bring cord pressure back to normal. The two main routes are microsurgery and embolization through the vessels, and some people need both.

Surgery or Embolization for a Spinal Dural Fistula?

No single answer fits everyone. However, published series often report more lasting closure with surgery for dural fistulas. Embolization, on the other hand, needs no incision and suits many people as a first step.

Then anatomy decides the rest. If the feeding artery also supplies the spinal cord, glue could block that supply too. In that case, microsurgery usually comes first.

Glue also has to reach the start of the vein. If it stops short, the fistula can reopen. So a control angiogram after embolization matters.

Who Makes the Decision

A neurosurgeon and an interventional neuroradiologist decide together, often with a neurologist. Prof. Albayrak performs the microsurgery and plans each case jointly with the interventional neuroradiology team, who carry out embolization.

What Happens During Spinal AVM Surgery?

Spinal AVM surgery is a microsurgical operation from the back of the spine under general anesthesia. First, the surgeon removes part of the bony arch at the right level, a step called laminectomy.

Next, the surgeon opens the dura and works under the operating microscope. In a dural fistula, the target is the vein that leaves the fistula, just inside the dura. The surgeon then closes and divides it.

During surgery, the team also injects a fluorescent dye into the bloodstream. This live angiogram confirms at once that the right vessel is closed.

Removing an AVM Inside the Cord

Work inside the cord, however, takes even more care. The surgeon closes the feeding arteries one by one and then frees the tangle from the cord tissue.

Meanwhile, nerve monitoring tracks the motor and sensory pathways nonstop. So the team notices strain on the cord right away and can adjust.

How Long the Operation Takes

Generally, surgery for a dural fistula takes a few hours. An AVM inside the cord, however, needs a longer and more complex operation.

Risks of Spinal AVM Surgery

Like any spinal cord operation, this surgery carries risks. Even so, the steady paralysis from an untreated fistula or AVM often weighs more.

• Temporary weakness or numbness: blood flow in the cord takes a few days to settle
• Lasting nerve loss: more likely after surgery inside the cord
• Spinal fluid leak: fluid can seep from the dural stitches and need extra care
• Infection and wound problems: rare, and they usually respond to treatment
• Reopening of the fistula: more common after embolization, so control imaging matters

Spinal AVM Surgery Recovery Time

Recovery depends mostly on how much damage existed before treatment. Once the fistula closes, cord pressure falls and the decline stops. Walking then improves clearly in many people.

Will Walking and Bladder Control Improve?

Walking especially often responds best. Bladder and sexual function, in contrast, recover less and more slowly. Cord tissue under pressure for years may not recover fully, so early diagnosis shapes the result most.

If symptoms return, your doctor checks with an angiogram whether the fistula has reopened.

Spinal AVM vs Brain AVM and Spinal Fistula

All three form through the same short circuit. Yet the usual age, the first symptoms and the treatment focus differ.

For the brain form, read our brain AVM guide.

Coming to Istanbul from the US, Canada, the UK or Europe

A slowly progressive fistula allows a short, planned trip, yet it should not wait for months. A sudden bleed, however, needs local emergency care first.

Records to Bring

• MRI of the whole spine, with reports, on a disc or USB drive
• Any MR angiography or catheter angiogram images
• A list of earlier treatments, including steroids or spine surgery
• Bladder test or EMG results, if you have them

How Long to Stay in Istanbul

First, plan a few days for the consultation and any spinal angiogram. Then, after surgery, most people stay in hospital for a few days and start walking early. Overall, many people plan for about two weeks, though your exact plan depends on the type.

When You Can Fly Home

The UK CAA sets no separate waiting time for spine surgery, so your surgeon decides when you can fly. The US CDC also warns that flying soon after surgery raises the risk of blood clots. So walk the aisle and keep your legs moving.

For insurance and Medicare, see planning surgery in Turkey from the US. For NHS rules, see planning from the UK. From Canada, check with your provincial health plan and private insurer before you book.

Your Spinal AVM Surgeon in Istanbul

Prof. Dr. Serdar Baki Albayrak

Neurosurgeon · Full Professor of Neurosurgery

Prof. Albayrak performs brain and spinal cord microsurgery with nerve monitoring to protect cord function. For spinal AVMs, he plans each case jointly with an interventional neuroradiology team.

After medical school at Marmara University, he trained in neurosurgery at Istanbul University. Clinical fellowships at the University of Helsinki and Harvard Medical School followed.

27+Years

5,000+Operations

64Countries

33Publications

Figures from Prof. Albayrak's professional profile, September 2026. See his full publication list.

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