What Is Congenital Scoliosis, and How Is It Monitored?
Congenital scoliosis is a sideways curve of the spine. It is caused by vertebral anomalies that form before birth. Unlike other types of scoliosis, the curve is there from day one. Monitoring is essential, because growth can make the curve worse. Low-dose standing imaging helps specialist teams track changes over time with less radiation exposure.
Key takeaways
- Congenital scoliosis is caused by vertebrae that did not form or separate properly during early pregnancy.
- It is not caused by posture, carrying bags, or anything the parent did.
- Monitoring is usually led by a specialist centre and may continue into adulthood.
- Repeated imaging means the total radiation dose matters. EOS technology uses about 90% less radiation than a standard X-ray, around ten times less.
- ScanAlign works alongside your specialist team, never as a replacement.
What causes congenital scoliosis?
Congenital scoliosis happens when one or more vertebrae do not develop normally in the first six weeks of pregnancy. The spine then curves to one side, because its building blocks are uneven. This is different from adolescent or degenerative scoliosis. Those develop later in life, for different reasons.
The exact cause is usually unknown. It is not linked to anything the mother ate, did, or was exposed to. In most cases, there is no family history. However, vertebrae form at the same time as other organs. So some people with congenital scoliosis are also screened for heart or kidney differences.
What are the main types of vertebral anomaly?
Vertebral anomalies in congenital scoliosis fall into two broad groups. Some people have a mix of both.
Part of a vertebra does not form at all. The most common example is a hemivertebra. Here only one side of the bone develops, creating a wedge shape that pushes the spine sideways.
Two or more vertebrae do not separate properly and are fused together on one side. This holds back growth on that side, so the curve worsens as the child grows.
Some spines have a combination of malformed and fused vertebrae. Mixed anomalies can be harder to predict and often need more frequent imaging.
The type, location and number of anomalies all affect whether the curve is likely to stay stable or progress during growth. That is why ongoing monitoring matters so much.
What are the signs of congenital scoliosis?
Many congenital curves are noticed in infancy or early childhood. Milder cases can go unnoticed until a growth spurt makes the curve easier to see. Some adults only find out about the condition when they are investigated for back pain or stiffness.
One shoulder sits higher than the other, or the waistline looks uneven.
A noticeable curve when bending forward, or one side of the ribcage standing out more.
Fused or malformed vertebrae can limit flexibility. This sometimes causes stiffness or aching that builds gradually over years.
If you notice sudden weakness, numbness, or loss of bladder or bowel control, these are red-flag symptoms. Please seek urgent medical attention from your doctor, or go to your nearest emergency department straight away.
How is congenital scoliosis monitored over time?
Monitoring is usually led by a specialist spinal centre. The goal is to track whether the curve stays stable or gets worse, especially during periods of fast growth. Most monitoring plans include regular clinical examinations. They also include imaging at intervals set by the specialist team.
Depending on the type and severity of the curve, the specialist may recommend observation only, bracing in certain situations, or surgery such as growing rods or spinal fusion. ScanAlign does not provide treatment. We offer the imaging that supports your specialist team's decisions.
Why cumulative radiation dose matters
Congenital scoliosis often needs imaging over many years, so the total radiation exposure adds up. Every scan is a small dose, but over dozens of visits those doses build up. This is where low-dose imaging technology becomes especially valuable. Using about 90% less radiation than a standard X-ray, around ten times less, helps keep the total dose as low as reasonably possible.
Worried about the total dose from years of monitoring? Ask your specialist whether a low-dose standing scan could be used for your next check. You can also book a monitoring scan and share the results directly with your clinical team.
How does standing imaging help with congenital scoliosis?
Standing imaging captures the spine in real-world conditions, with gravity and your body weight acting on the curve. When you lie down for a conventional X-ray or MRI, the muscles relax. The curve can then look less severe than it actually is. A standing, weight-bearing scan shows the curve as your body truly experiences it.
What it shows: The full spine and pelvis in a single upright image. Weight-bearing alignment, compensatory curves, and how the pelvis and hips respond to the spinal anomaly.
Why it matters for congenital scoliosis: Your body makes up for a structural curve by adjusting posture elsewhere. Standing imaging shows those compensations clearly, giving your specialist the complete picture.
What it shows: Bone and soft-tissue detail, but with the spine unloaded. Muscles relax, and gravity is taken out of the equation.
The limitation: The curve may appear smaller than it is in daily life. This can understate the true alignment picture.
ScanAlign, low dose standing imaging uses EOS technology to capture a full-length image of your skeleton while you stand naturally. The scan takes only a few seconds and uses about 90% less radiation than a standard X-ray, around ten times less. For paediatric imaging at ScanAlign, this low dose is especially important. A young person with congenital scoliosis may need many scans over the years.
When is MRI the better choice? EOS shows bones, joints and alignment beautifully. For soft tissue, discs, the spinal cord or nerves, MRI is usually the better tool. Many people with congenital scoliosis need both types of imaging at different stages. Your specialist team will advise which is right for each check.
Is a standing alignment scan right for you?
A low-dose standing scan can be a useful addition to your monitoring plan. But it is not the right choice for everyone.
- Have a confirmed congenital scoliosis diagnosis and want to reduce the total radiation from monitoring
- Are an adult whose curve has not been checked again in years
- Need a full-length standing image to share with a surgeon or physiotherapist
- Want to see how your whole skeleton makes up for the curve
- Your specialist centre's monitoring programme
- MRI when the spinal cord or nerves need to be assessed
- Heart or kidney screening for related anomalies
- Emergency assessment if you have sudden neurological symptoms
Before you start treatment, or change the one you are on, it is worth getting a detailed diagnosis. Knowing whether the cause sits in the pelvis, the legs or the spine changes what will actually help.
Frequently asked questions about congenital scoliosis
Congenital scoliosis is caused by vertebrae that formed abnormally before birth. Idiopathic scoliosis develops later, usually during the teenage years, and its cause is unknown. The two conditions behave differently and are managed differently.
It can. Most progression happens during childhood growth spurts. But some curves keep changing slowly in adulthood, particularly if the anomaly creates ongoing imbalance. Regular imaging helps your specialist spot any gradual change.
In most cases, no. Congenital scoliosis usually occurs without a family history. Researchers have found some genetic links, but the condition is generally considered sporadic rather than inherited.
A hemivertebra is a vertebra where only one side developed fully, giving it a wedge or triangular shape. It is the most common type of failure of formation. It typically causes the spine to tilt to one side.
The vertebrae, kidneys and heart all begin to form at a similar stage of early pregnancy. A vertebral anomaly can sometimes occur alongside differences in these organs. Screening for related anomalies is a standard part of the first assessment.
An EOS scan uses about 90% less radiation than a standard X-ray, around ten times less. This is especially important for anyone who needs repeated imaging over many years, where the total dose is a concern.
No. You can refer yourself. We recommend starting with a free video consultation. This lets us understand your situation, confirm the scan is suitable, and make sure the results will be useful to your specialist team.
No. ScanAlign is a diagnostic imaging clinic. We provide the images, but your specialist centre manages your ongoing care. This includes clinical assessments, treatment decisions and multidisciplinary support. We work alongside your team, not instead of them.
For patients travelling from abroad, the price is confirmed during the free video consultation.
Bring any previous imaging or reports if you have them. Also bring details of your specialist team, so we can share results with them directly if you wish. Wear comfortable clothing without metal fastenings if possible.
Want to discuss whether a standing scan fits your monitoring plan?
A short video call with our specialist radiographer costs nothing and carries no obligation. You can join it from home before deciding to travel to London. We can review your history and advise whether EOS imaging would add value for your team.
Book a free video consultationWritten by Abbas Dhami (Specialist Diagnostic Radiographer)
Sources
- Hedequist D, Emans J. Congenital scoliosis: a review and update. Journal of Pediatric Orthopaedics. 2007;27(1):106-116.
- Scoliosis Research Society. Congenital scoliosis overview. srs.org (accessed 2024).
- NHS. Scoliosis: overview, diagnosis and treatment. nhs.uk (accessed 2024).
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.