Pediatric Neurosurgery

Most of this specialty is not brain surgery. A good deal of it is not surgery at all.

Spine, skull, fluid and nerve fill more of a pediatric neurosurgical week than tumors do, and the three largest advances of the past twenty years all moved in the same direction, which was earlier, smaller, or not at all. This page explains what the department treats, what the evidence changed, and why a child here is enrolled for years and not treated once.

What the department treats

Say the words pediatric neurosurgeon to most people and they picture a brain tumor. Tumors are part of the work and they are the part that frightens families most, yet they occupy a smaller share of the operating list than almost anyone outside the field expects. The larger share belongs to the spine that formed incompletely before birth, to the skull whose seams closed too early, to fluid that cannot find its way out, and to the head injuries that arrive at two in the morning and mostly need nothing done to them at all. That last group is the largest of the four. Those conditions have almost nothing in common medically. What links them is that each one is caught early, watched for years and dealt with in stages, so the relationship between the department and the family tends to outlast any individual operation by a decade or more. A baby whose back is closed in the first week of life is seen again at four because the cord has started to pull, at nine because the bladder has changed, and at fourteen because the spine has curved during a growth spurt. None of that is a complication. All of it is the condition doing what the condition does, and a unit that thinks of itself as an operating list and not as a service tends to be caught out by it.

One other thing belongs at the top. This specialty has spent twenty years growing less aggressive and not more, and the three changes with the best evidence behind them all pushed the same way. One moved the operation to before birth. One replaced a long operation with a short one through a keyhole. One taught everybody to scan less. One established that most injured children should never be scanned in the first place. Every section below is organized around that idea.

The four groups of work

Grouping the conditions by the part of the nervous system involved makes the shape of the department clear faster than any list of operations does.

This table scrolls sideways on a narrow screen. Swipe or drag to see every column.

Why the mix catches families off guard

Two columns explain it. Most of this work presents in the first year of life and a large part of it presents before the child has any symptoms at all, discovered on a routine scan or noticed by a midwife. So the first conversation is often with parents who feel nothing is wrong, for an operation intended to prevent something that has not happened yet, which is a much harder conversation than the one concerning a tumor that is visibly causing trouble.

That difficulty shapes the whole first conversation.

Parents find prevention the hardest thing to consent to

Nobody thanks a surgeon for a deficit that never appeared. Our answer to that is to show families the natural history of their child's specific condition, in numbers, and to be candid when the case for operating amounts to buying insurance whose value will never be visible to them. Some of these operations genuinely are insurance. Saying so out loud costs nothing and it makes the difficult cases easier to discuss later.

Spina bifida and the operation that moved

Spina bifida, in its open form, means the spinal cord developed without the covering that should have grown over it, so the nerves sit exposed to amniotic fluid for months before delivery. Standard treatment for decades was to close the defect within the first day or two after birth and then manage everything that followed, which for most children meant a drainage device for fluid, a hindbrain pushed down into the neck, weak legs and a bladder that never worked normally. Reasonable people assumed the damage was done at the moment the spine failed to close.

The trial that changed the timing

A randomized trial assigned women carrying affected babies to closure before 26 weeks of pregnancy or to standard closure after delivery, and it was stopped early because the prenatal group was doing better. Forty percent of the babies repaired before birth needed a drainage device by the age of one, against 82 percent of those repaired afterward. The hindbrain came back up in a large share of them. At 30 months the prenatal group scored better on combined mental and motor testing and more of them were walking. You would see none of that if the damage were complete at the moment of the defect.

The reason it works is that the injury turns out to be progressive. Nerve tissue left bathing in fluid and rubbing against the wall of the uterus keeps getting damaged through the second and third trimesters, so closing the defect at 24 weeks prevents part of an injury that would otherwise still be accumulating. That single insight reframed a condition everyone had treated as fixed at conception, and it is the clearest example in this specialty of a result that rewarded acting earlier over operating harder.

So much for the benefit side.

What it cost, and who pays that cost

Read the second half of the result before deciding anything. Prenatal surgery meant opening the uterus of a healthy woman for the benefit of her fetus, and it produced more preterm deliveries and a meaningful rate of thinning or separation of the uterine scar at delivery, with consequences for later pregnancies. That is a risk borne entirely by the mother, for a benefit received entirely by the child, which is an ethical situation with very few parallels in medicine. Any unit that presents this operation as a straightforward upgrade is not describing it accurately.

Where this leaves a family today

Repair before birth has become a standard option for prenatally diagnosed cases, offered in a small number of centers, under strict criteria on gestational age, the level of the defect, maternal health and the absence of other abnormalities. Most families we see arrive after birth, past the window, and for them the question is not which repair they missed, since what counts then is the closure, the fluid, and everything the next fifteen years will ask of the spine, which the following section covers.

Tethered cord, the second operation

Closing the back is not the end of the story, and families are told that it is.

A spinal cord that has been operated on scars to the tissue around it, and a child grows while the cord does not lengthen to match, so tension builds up slowly over years until something gives. The first sign is rarely dramatic. A foot that starts turning in, a leg that becomes weaker on one side, back or leg pain that arrives during a growth spurt, a child who was dry at night and is no longer dry, a curve appearing in the spine. Not one of them looks like an emergency. Each of those can be explained away individually, and in a child with spina bifida every one of them deserves a scan and a urodynamic study instead of reassurance. Releasing the tethered cord means going back through the old scar, finding the plane between the cord and the wall it has stuck to, and freeing it under the microscope with the nerves monitored throughout. A series of 80 children reported improvement in preoperative symptoms in 79 percent of them, with complications in 5 percent, namely two fluid leaks and two infections. Untethering works. It is also an operation that can be done too readily, which is the reason the next paragraph exists.

Not every child with an unusual looking cord on a scan needs releasing. A center in Seoul reviewing 439 untethering operations over ten years found only five children, just over one percent, who fitted the strict definition of an occult tethered cord, meaning genuine symptoms with a completely normal scan, confirmed on bladder testing or nerve conduction. That figure cuts both ways and both halves matter. The condition is real and it responds to surgery, and it is rare enough that a unit diagnosing it frequently is diagnosing something else.

So we ask for objective evidence before untethering. Progressive change on examination, a bladder study that has deteriorated against a previous one, or a clear structural cause on imaging, while a low lying cord on a scan in a child with no symptoms and a normal bladder gets watched, and we tell families plainly that watching is the treatment.

Craniosynostosis and the keyhole

A baby's skull arrives in separate plates with flexible seams between them, and those seams are what let the head grow as the brain does, so where one closes too early growth stops across that line and continues everywhere else, so the head takes a predictable shape depending on which seam fused.

1. Sagittal, the seam along the midline. The commonest by a distance, producing a head that grows long from front to back and stays narrow across.
2. Metopic, in the forehead. Gives a keel shaped ridge down the middle of the forehead and eyes that sit closer together.
3. Coronal, running ear to ear. Flattens one side of the forehead when a single side is affected, and distorts the eye socket beneath it.
4. Lambdoid, at the back. The rarest, and the one most easily confused with the flattening that comes from a baby sleeping on one side.

Two operations, and the numbers that separate them

Traditional repair means opening the scalp from ear to ear, taking the affected part of the skull off, reshaping it on the table and putting it back, which takes hours and is done at around a year of age. The alternative removes a strip of the fused seam through two small incisions with an endoscope, in an infant of two to four months, and lets the growing brain do the reshaping afterward with a molding helmet worn for several months. Pooled data across 2,064 children put the endoscopic approach ahead on blood loss by around 162 milliliters, on operating time by nearly two hours, and on hospital stay by two and a half days. The odds of needing a transfusion fell by roughly nine times. A more recent analysis restricted to the sagittal seam, covering 2,365 children across 17 studies, found the same pattern and added that the head shape achieved was comparable between the two. Comparable shape, far less blood, half the time in hospital, and a helmet for six months. That is the trade, and it only exists for babies who reach us early enough to take it.

Head injury and learning not to scan

More children pass through a neurosurgical service after a bang on the head than for any other reason, and the overwhelming majority of them need nothing beyond a few hours of watching. The difficulty has never been the treatment, and working out which child in a crowded waiting room is the one with a problem, without irradiating the other two hundred to find out, is all of it.

42,412 children, and what the arithmetic showed

A study across 25 emergency departments enrolled every child arriving within a day of a head injury and looking essentially awake and normal. Just over a third had a computed tomography scan. Clinically important brain injury turned up in 0.9 percent of them and 0.1 percent had an operation, which is one child in a thousand. From that the investigators built two age specific rules, one for babies under two and one for older children, using only things a doctor can see and ask about. In validation, the rules missed no child who needed neurosurgery, and they identified a fifth to a quarter of the scanned children as a group who could have been left unscanned.

What those rules changed was the default. Scanning a child delivers radiation to a developing brain and to a thyroid gland that will be there for eighty years, and the risk from one scan is small while the risk from a habit of scanning everybody is not. Under two, the questions are about mental state, scalp swelling outside the forehead, loss of consciousness, how severe the mechanism was, whether the skull feels intact, and whether the parents think the child is behaving normally, while over two the list covers mental state, loss of consciousness, vomiting, the mechanism, signs of a base of skull fracture and severe headache. Clear on every one of them means watching, with no scan at all.

The default now runs the other way.

What we do instead

Observation, with somebody checking at intervals and a written list of what should bring you straight back. Magnetic resonance imaging where a picture is genuinely needed and the child can hold still or be sedated safely. And a plain conversation with parents who came in expecting a scan and are being told, correctly, that the scan is the thing most likely to do harm today.

Fluid that cannot get out

The brain makes fluid continuously and it has to drain away at the same rate. Block that circuit anywhere and pressure rises, which in an infant whose skull seams are still open shows up as a head growing too fast, and in an older child as morning headache, vomiting and sleepiness. Causes range from bleeding in a premature baby to infection, tumor, spina bifida or a narrowing the child was born with.

1. Treat the blockage itself where that is possible. Removing a tumor sitting on the drainage pathway sometimes solves the problem without anything further.
2. Make a new route with an endoscope. A small opening in the floor of the third ventricle lets fluid bypass an obstruction, and no device stays in the child.
3. Place a valve and tube. Reliable, available to every child regardless of anatomy, and a commitment that lasts for life.

Why the order of that list matters

Each option down the list is more certain to work and leaves more behind. Endoscopic drainage suits particular anatomy and particular ages and fails in others, so it cannot be offered to everybody, and pretending otherwise leads to a child having two operations where one would have done. A valve works in nearly everyone and then becomes a lifelong relationship with a device that can block, infect or need lengthening, so our practice is to assess each child for the endoscopic route honestly, to use it when the anatomy supports it, and to place a valve without apology when it does not.

Seizures and functional work

Two kinds of children come to this part of the service. Those whose seizures no longer answer to medication, and those whose movement has been damaged by an injury around the time of birth, and both are treated by operations aimed at function instead of survival, and in both the commonest mistake is delay. Waiting costs them years.

Once two properly chosen medications have failed, the chance that a third or fourth will control the seizures is small, and every year spent finding that out is a year of development that the child does not get back. The same logic applies to spasticity in cerebral palsy, where the operations that reduce tone permanently work best before joints and muscles have deformed around years of pulling, and both are assessed by a team rather than by one surgeon, and both have their own detailed pages on this site.

What a first assessment involves

Families writing from abroad usually send a diagnosis and a question about price. We answer the diagnosis first, because a surprising share of the time the diagnosis is the thing that needs work. Send the imaging itself and not the report. Magnetic resonance studies in the sequences the condition needs, of the brain or the whole spine or both. Any previous operative notes, the pathology if there was any, growth charts and head circumference measurements for a baby, bladder studies for a child with a spinal condition, and a short account in your own words of what changed and when. Photographs of a head shape from four angles help more than most people expect. Send those too. We read all of it, we write back with an opinion, and the opinion sometimes says that the operation being proposed elsewhere is not the one we would do, or that no operation is needed yet. We charge nothing for that review, whether or not you come here, and telling a family that their child does not need surgery is part of the job and it costs us nothing to say so early.

Risks by group of operation

Averages help nobody here. Risk in this specialty depends far more on which operation is being done than on any general statement about pediatric neurosurgery, so the table separates them.

This table scrolls sideways on a narrow screen. Swipe or drag to see every column.

Notice that the right hand column contains no equipment nobody else has. Everything that reduces risk here is a matter of selection, discipline and knowing when to stop, which is why volume of practice keeps appearing in outcome studies while brand of instrument does not.

Anesthesia and the small patient

Half of what makes a pediatric neurosurgical operation safe never appears in the operative note, because it belongs to the person at the head of the table.

Babies lose heat quickly through a large head on a small body, and cold blood clots badly. Circulating volume in a four month old is measured in a few hundred milliliters, so the loss that passes unremarked in an adult becomes a transfusion decision here, and this is precisely why the blood loss figures in the craniosynostosis comparison matter more than they look. Blood pressure held slightly too low for a few minutes in a field where perfusion is marginal produces a child who does not wake properly. Fluid given too generously swells the brain into the surgeon's working space. Little of it reaches the operative note.

So find out who will be anesthetizing your child and how many infants they look after in a year. A unit that does this work regularly answers immediately.

Recovery and going home

Timetables differ so widely between these operations that a single answer would mislead everybody. A keyhole skull procedure in a three month old typically means one night in hospital and a helmet fitted within two weeks, while open skull reshaping means intensive care, a swollen face for several days that alarms parents far more than it should, and the better part of a week on the ward. Untethering means lying flat for two or three days to protect the repair, then a slow return to normal activity over a month. Spinal closure in a newborn means nursing on the front, careful wound watching and a stay measured in weeks rather than days, because the fluid situation has to declare itself before anyone goes anywhere.

What stays the same across all of them

A parent sleeps in the room. Pain gets treated properly and not stoically, since children who hurt do not move, and children who do not move develop chest and skin problems. Therapists see the child on the ward, with nothing held back until discharge. Feeding restarts as early as the operation allows, and nobody leaves without a written summary that names the operation, the findings, the device if one was placed, the plan, and the date of the next review.

Get that summary into your hand before you pack. A verbal handover lasts as long as the taxi ride to the airport.

Enrolled, and not simply treated

Here is the difference between this department and most surgical services, and it shapes everything above. Children treated here do not finish. The conditions that fill this list change as the child grows, so the follow up is the treatment as much as the operation was, and a family that understands this from the first week does far better than one that discovers it at year four.

For families abroad this raises an obvious problem, since we are not the ones who will see the child at every stage, so we write for the doctor at home rather than for our own records, in English, with the schedule of what is due and when. We read scans sent to us afterward, at no charge, for as long as the family wants us involved.

Traveling here with a child

We build the logistics around a family and not around a patient traveling alone, which is a different set of problems.

None of that is the important part. Everything starts with the imaging, so send that before you discuss any of it, because the only question that matters first is whether the operation being proposed is the right one.

Cost, timing and flying home

Length of stay follows the operation. Keyhole skull surgery and endoscopic fluid procedures usually mean five to seven nights in the country in total. Untethering and open skull reshaping run to around two weeks, while tumor surgery runs longer at commonly two to three weeks, and a newborn spinal closure is measured in weeks because the fluid situation has to settle before anyone can plan a journey. We give you your own number in advance.

Fitness to fly, and what shapes the quote

We judge flying on pressure inside the head and on the wound, in that order. A child with settled fluid circulation, a dry healed wound, normal feeding and a satisfactory scan is safe on an aircraft, while one with an unanswered pressure question stays until the question is answered, and we will say that even when the tickets are already bought, because cabin pressure is the least of the problem and distance from a neurosurgical unit is most of it. Four things move the cost. Which operation is done, and how long the surgeon expects to be in the room for it. Whether intensive care is needed and for how many nights. Whether implants are involved, meaning a valve, a helmet or fixation plates. And whether the child needs other departments alongside us, usually urology, orthopedics or oncology. We put all of that in writing once the scans have been read and we publish no figures here, since a price quoted before anyone has seen the imaging is a number invented to win an inquiry.

Follow up once you are home carries no charge at all. Send the scans, send the measurements, send a photograph of the head shape if that is what is being watched, and we will read them and reply.

Questions worth asking any unit

Put these to us and to everyone else you are considering, then compare the answers side by side. Specific numbers are the point, and vagueness in the reply is itself an answer. How many children of my child's age, with exactly this condition, did this surgeon operate on last year, and which other specialties will be involved, and will they see my child during this admission. Who anesthetizes infants here and how often. If my child needs a device, which one will you use and why that one. What happens if something goes wrong after we have flown home, who reads the scan and how quickly. And one more, which tells you the most. Put to them what the alternative to operating would be, and how the unit would recognize that the alternative was the better choice. A surgeon who cannot describe the case against their own recommendation has not examined it.

Pediatric neurosurgery FAQ

Families ask the following in their first message more than anything else.

References

1. Adzick NS, Thom EA, Spong CY, Brock JW, Burrows PK, Johnson MP, et al. A randomized trial of prenatal versus postnatal repair of myelomeningocele. New England Journal of Medicine. 2011;364(11):993-1004.
2. Kuppermann N, Holmes JF, Dayan PS, Hoyle JD, Atabaki SM, Holubkov R, et al. Identification of children at very low risk of clinically-important brain injuries after head trauma. A prospective cohort study. Lancet. 2009;374(9696):1160-1170.
3. Goyal A, Lu VM, Yolcu YU, Elminawy M, Daniels DJ. Endoscopic versus open approach in craniosynostosis repair. A systematic review and meta-analysis of perioperative outcomes. Child's Nervous System. 2018;34(9):1627-1637.
4. Palavani LB, Costa M, Banderali I, Zattar Ribeiro PV, Nogueira BV, Belfort Santos M, et al. Endoscopic versus open treatment for sagittal craniosynostosis. A systematic review and meta-analysis. Neurosurgical Review. 2025;48(1):262.
5. Yang J, Won JK, Kim KH, Lee JY, Kim SK, Shin HI, et al. Occult tethered cord syndrome. A rare, treatable condition. Child's Nervous System. 2022;38(2):387-395.
6. Liu M, Deng W, Lu YY, He YZ, Huang LY, Du H. Surgical treatment of tethered cord syndrome showed promising outcome in young children with short duration. European Review for Medical and Pharmacological Sciences. 2023;27(5):1831-1836.
7. Moldenhauer JS, Adzick NS. Fetal surgery for myelomeningocele. After the Management of Myelomeningocele Study. Seminars in Fetal and Neonatal Medicine. 2017;22(6):360-366.