Thoracogenic scoliosis is a lateral curvature of the spine that develops as a direct consequence of disease, injury, or surgery involving the chest wall or thoracic cavity. Unlike the more familiar adolescent idiopathic scoliosis, where the cause is unknown, thoracogenic scoliosis has an identifiable trigger: something happened to the thorax first, and the spine curved in response. The condition was formally described as early as 1934, when researchers studied over 850 patients with various thoracic diseases and chest operations to map out how and why these curvatures form.1JAMA Network (Arch Surg). THORACOGENIC SCOLIOSIS: INFLUENCE OF THORACIC DISEASE AND THORACIC OPERATIONS ON THE SPINE While many thoracogenic curvatures remain mild, a meaningful subset progresses enough to cause visible deformity, chronic pain, or impaired breathing.
What Causes the Spine to Curve After Chest Problems
The chest wall and the spine are structurally interdependent. The ribs attach to the thoracic vertebrae in the back and to the sternum in the front, creating a semi-rigid cage. When that cage is disrupted on one side, whether by surgical cutting, scar tissue, infection, or abnormal growth, the forces acting on the vertebrae become unbalanced. The spine, still growing in children and somewhat adaptive even in adults, drifts toward the side with less resistance or gets pulled toward the side with more contracture. The resulting curve is “thoracogenic” because it originates from the thorax rather than from the vertebrae themselves.
The causes fall into two broad camps: surgical and non-surgical. Surgical causes include thoracotomy (opening the chest through the ribs), sternotomy (splitting the breastbone), and chest wall resection for tumors. Non-surgical causes include lung infections like empyema, radiation therapy to the chest, and extensive burn scarring across the trunk.
Thoracotomy and Heart Surgery in Children
The most commonly studied trigger is thoracotomy performed in childhood, especially for congenital heart disease. When surgeons open the chest through the ribs to reach the heart or great vessels, they cut through intercostal muscles, sometimes spread or remove rib segments, and leave behind scar tissue that can tether growth on one side. The younger the child at surgery, the more years of asymmetric growth remain ahead, and the greater the risk that a curve will develop and worsen.
How common this actually is depends heavily on the study. One investigation of children who had congenital heart surgery in their first year of life found scoliosis in roughly 42% at follow-up, though most of those curves were mild. About a third of the children had curves between 10 and 20 degrees, while only about 5% had curves reaching 20 to 30 degrees and a smaller fraction reached 45 degrees or more.2PubMed Central. Prevalence of and Predictive Factors for Scoliosis After Surgery for Congenital Heart Disease in the First Year of Life The predictive factors for more severe curves included heart enlargement (cardiomegaly), the number of surgical procedures a child underwent, and whether a left-sided or bilateral thoracotomy was performed.
Other studies report much lower rates. A separate investigation of children who had thoracotomy or sternotomy for congenital heart disease confirmed scoliosis in only about 1% of the thoracotomy group and a similar fraction of the sternotomy group.3PubMed Central. Scoliosis after thoracotomy/sternotomy in children with congenital heart disease The discrepancy likely reflects differences in follow-up length, age at surgery, how aggressively imaging was pursued, and what threshold was used to define a meaningful curve. The bottom line is that some degree of spinal asymmetry after childhood thoracotomy is not unusual, but clinically significant scoliosis requiring treatment is less common.
Chest Wall Resection and Tumor Surgery
When a tumor involves the ribs or chest wall, surgeons may need to remove one or more rib segments along with surrounding soft tissue. This creates a structural gap in the thoracic cage, and the spine can curve toward or away from the defect. The mechanism is both mechanical, because the cage loses its normal support, and partly paralytic, because the muscles that normally stabilize the spine on that side are cut or removed.
A case series of patients who developed scoliosis after posterior chest wall resection found that prophylactic spinal fixation at the time of tumor surgery appeared to reduce the risk of subsequent curvature.4PubMed Central. Scoliosis Following Chest Wall Resection for Tumor With and Without Prophylactic Fixation This is a niche scenario, but it illustrates that surgeons operating on the chest wall are increasingly aware of what the spine might do afterward and can sometimes intervene preemptively.
Among long-term survivors of childhood sarcoma treated with chest wall radiation or surgery, scoliosis was associated with worse pulmonary function, more functional impairment, and more cancer-related pain compared to survivors without scoliosis.5PubMed Central. Associations between treatment, scoliosis, pulmonary function, and physical performance in long-term survivors of sarcoma That finding highlights how thoracogenic scoliosis is not just a cosmetic concern; it carries real downstream health effects for people who have already been through major illness.
Non-Surgical Causes: Infection, Burns, and Radiation
Before modern antibiotics and drainage techniques, empyema (a collection of pus in the space between the lung and the chest wall) was a far more common cause of thoracogenic scoliosis. Severe empyema causes the affected lung to collapse and the pleural space to thicken with scar tissue. If this happens in a growing child, the scarred side of the chest falls behind in growth, pulling the spine into a curve. Researchers noticed this pattern as early as the 1930s and found that while some patients recovered without lasting spinal deformity, others developed persistent scoliosis that was clearly tied to their chest infection.6Archives of Surgery. Scoliosis Following Empyema Empyema-related scoliosis is rarer now, but it still occurs in settings where lung infections go undertreated.
Extensive burn scarring across the trunk can also drive spinal curvature. Burn contractures pull the skin and underlying tissues tight, and when the scarring is asymmetric, the spine follows. A documented case involved a man who was scalded at age 10, developed kyphoscoliosis (both a side-to-side curve and an exaggerated forward rounding) by age 12, and saw the deformity progress rapidly as the contractured scar tissue on his right flank, back, and chest wall restricted normal growth.7PubMed Central. Staged corrective surgery for complex adolescent kyphoscoliosis caused by back scalding during the childhood period Correction required staged surgery addressing both the scar contracture and the spinal deformity.
Radiation therapy to the chest wall, particularly in children treated for sarcomas, is another recognized cause. Radiation can damage the growth plates of the vertebrae, and when one side of the spine receives a higher dose, uneven growth follows. Interestingly, one study of pediatric patients who received chest wall radiation found no clear relationship between the radiation dose to individual vertebral bodies and the severity or direction of the resulting scoliosis.8PubMed Central. Late toxicity and outcomes following radiation therapy for chest wall sarcomas in pediatric patients That suggests the mechanism is more complex than simple dose-dependent growth-plate damage, and soft tissue changes, rib effects, and muscle fibrosis all play a role.
How Thoracogenic Scoliosis Differs from Idiopathic Scoliosis
The distinction matters for treatment. Adolescent idiopathic scoliosis is primarily a spinal deformity; the chest may become asymmetric as a consequence, but the spine is the origin of the problem. In thoracogenic scoliosis, the chest wall is deformed first, and the spine follows. Clinicians treating severe spinal deformity emphasize that both the spine and the chest wall are affected in thoracogenic cases, which makes the management fundamentally different from standard scoliosis care.9Spine. Management of Severe Spinal Deformity
Practically, this means that straightening the spine alone may not be enough. If the underlying chest wall asymmetry is not addressed, the spine may curve again, or the patient may still have impaired breathing even with a straighter spine. It also means that patients with thoracogenic scoliosis tend to present with worse pulmonary function than those with idiopathic curves of similar magnitude, because the chest wall deformity compounds the restrictive effect of the spinal curve.
Effects on Breathing and Physical Function
Severe scoliosis of any type can compromise lung function, but thoracogenic scoliosis is particularly problematic because the chest wall is already compromised before the spinal curve even begins. The chest distortion reduces lung volumes, limits how far the diaphragm can move, and makes the muscles between the ribs work less efficiently.10PubMed Central. Scoliosis and bronchial obstruction The result is restrictive lung disease, where the lungs cannot fully expand even though the airways themselves may be clear.
In children, this is especially concerning because the lungs are still developing. Untreated early-onset scoliosis, including thoracogenic cases, can lead to progressively worsening lung function, and in severe cases, increased risk of serious illness and shortened lifespan.11PubMed Central. Magnetic Controlled Growth Rods in the Treatment of Scoliosis: Safety, Efficacy and Patient Selection Children with thoracic insufficiency syndrome, where the thorax cannot support normal breathing or lung growth, often have reduced exercise capacity. In formal testing, their maximum oxygen consumption and work output are diminished in proportion to how restricted their lung volumes are.
Congenital Thoracic Anomalies and Thoracic Insufficiency Syndrome
Some children are born with fused ribs or other structural anomalies of the chest wall that cause both scoliosis and thoracic insufficiency from the start. This overlaps with thoracogenic scoliosis in the sense that the chest deformity drives the spinal curve. The combination of fused ribs and congenital scoliosis can produce a three-dimensional thoracic deformity that impairs both thoracic growth and respiratory function.12PubMed. The characteristics of thoracic insufficiency syndrome associated with fused ribs and congenital scoliosis These children represent one of the most challenging groups to treat because both the spine and the rib cage need to be managed simultaneously, and the child still has years of growth ahead.
Treatment in these patients typically involves expansion thoracostomy, a procedure where the fused ribs are surgically separated to open up the chest, combined with a growth-friendly implant that maintains the opening and allows the thorax and spine to continue growing. Fourteen patients with cervical tilt, fused ribs, progressive congenital scoliosis, and thoracic insufficiency syndrome treated with this approach showed improvement in their primary thoracic scoliosis and in the space available for the lungs, along with better head and trunk alignment.13PubMed. The effect of mid-thoracic VEPTR opening wedge thoracostomy on cervical tilt associated with congenital thoracic scoliosis in patients with thoracic insufficiency syndrome
Can Minimally Invasive Surgery Reduce the Risk
One of the most practical questions for parents of children facing chest surgery is whether the surgical approach matters. The evidence increasingly says yes. A retrospective study comparing thoracoscopic (camera-assisted, minimally invasive) versus open thoracotomy repair of esophageal atresia found that musculoskeletal deformities were dramatically less common in the thoracoscopy group. Scoliosis occurred in about 14% of children after open thoracotomy compared to only about 2% after thoracoscopy, and no child in the thoracoscopy group developed a curve of 20 degrees or more.14PubMed. Thoracic Musculoskeletal Deformities Following Surgical Treatment of Esophageal Atresia – Thoracoscopic Versus Open Approach Rib fusion, which contributes to ongoing chest wall asymmetry, was absent entirely in the thoracoscopy group but present in over a third of the thoracotomy group.
Not every condition can be treated thoracoscopically, and for some complex congenital heart repairs, an open approach remains necessary. A study comparing the two approaches in children with congenital lung malformations found no significant difference in musculoskeletal outcomes, which may reflect the smaller surgical footprint of lung resection compared to heart surgery.15PubMed. Comparison of thoracoscopy vs. thoracotomy on musculoskeletal outcomes of children with congenital pulmonary airway malformation (CPAM) Still, the trend in pediatric surgery is toward minimally invasive techniques where feasible, in part because of the growing awareness that open chest surgery carries long-term skeletal consequences.
Treatment of Established Thoracogenic Scoliosis
Once a thoracogenic curve has developed, treatment depends on the patient’s age, the severity of the curve, whether the curve is progressing, and how much the chest wall is involved. Mild, stable curves in older adolescents or adults may simply be monitored. Moderate curves that are still progressing in a growing child typically require intervention.
For young children with early-onset scoliosis and thoracic insufficiency, the vertical expandable prosthetic titanium rib (VEPTR) has become a key tool. The VEPTR was originally designed not to straighten the spine directly but to expand the chest, improve the space available for the lungs, and indirectly control the spinal curve as the child grows.16PubMed Central. Long term outcome of vertical expandable prosthetic titanium rib treatment in children with early onset scoliosis It attaches to the ribs rather than to the spine, which is a meaningful distinction: spine-based growing rods can cause stiffness and fusion of spinal segments over time, while rib-based devices spare the spine itself.
In a case series of children with congenital early-onset scoliosis treated with VEPTR, the average curve measured 65 degrees before surgery and improved to 50 degrees after the initial procedure, though it crept back to 58 degrees at the final follow-up after a mean of about seven years. The space available for the lungs improved from 86% preoperatively to 97% at last follow-up, which is a meaningful gain for children whose breathing is compromised.17PubMed Central. Operative management of congenital early-onset scoliosis using the vertical expandable prosthetic titanium rib (VEPTR) The catch is that VEPTR requires repeated surgeries for lengthening as the child grows, and some correction is lost over time.
For children with chest wall deformity and fused ribs specifically, the recommended approach involves expansion thoracostomy (surgically opening the fused ribs) combined with VEPTR insertion and serial lengthening procedures. Early intervention, before the deformity becomes severe, is favored because spinal growth continues during treatment.18Spine. The Treatment of Spine and Chest Wall Deformities With Fused Ribs by Expansion Thoracostomy and Insertion of Vertical Expandable Prosthetic Titanium Rib This approach requires a multidisciplinary team, careful surgical technique for soft tissue management, and close long-term follow-up.
Magnetically controlled growing rods represent a newer alternative that reduces the number of surgeries needed. These rods can be lengthened through the skin using an external magnet, avoiding repeated open procedures. They have gained traction for early-onset scoliosis broadly, though their specific role in thoracogenic cases is still being defined.11PubMed Central. Magnetic Controlled Growth Rods in the Treatment of Scoliosis: Safety, Efficacy and Patient Selection
Complications and Surgical Risks
Surgery for thoracogenic scoliosis carries higher complication rates than surgery for idiopathic scoliosis. In one series of 17 patients who underwent surgery for thoracogenic spinal deformity, there were 13 complications among 7 patients. These included a brachial plexus palsy (nerve damage affecting the arm) after rib-based distraction rod placement, which resolved after the rib hooks were repositioned.19Journal of Neurosurgery: Spine. Thoracogenic spinal deformity: a rare cause of early-onset scoliosis By contrast, patients in the same study who were managed without surgery had no reported complications. The higher complication rate reflects the complexity of operating on a spine that is already being influenced by a deformed chest wall, often in young children with other medical problems.
The need for multiple surgeries is another burden. VEPTR patients typically undergo lengthening procedures every six to nine months during growth, and the risk of implant-related problems, wound issues, and infection accumulates with each additional operation. Families need to be prepared for a treatment course that extends across years, not a single corrective event.
Imaging and Diagnosis
Standard standing X-rays of the full spine remain the backbone of scoliosis diagnosis. For thoracogenic scoliosis specifically, imaging of the chest wall is just as important as imaging of the spine, because treatment planning requires understanding the rib anatomy, any areas of fusion or resection, and the three-dimensional shape of the thorax. CT scans provide detailed bone anatomy and are useful for surgical planning, while MRI is used when the spinal cord or soft tissues need assessment.
Low-dose biplanar imaging systems have become increasingly useful for spinal deformities, offering three-dimensional reconstructions of the spine and thorax with substantially less radiation than conventional CT. This is particularly relevant for children with thoracogenic scoliosis, who face repeated imaging over years of growth and treatment.20PubMed Central. EOS® imaging: Concept and current applications in spinal disorders Reducing cumulative radiation exposure matters when a child may need dozens of imaging studies before reaching skeletal maturity.
When Burn Scar Contractures Require Staged Surgery
Thoracogenic scoliosis caused by extensive burn scarring presents a distinct surgical challenge. The spinal curve cannot be meaningfully corrected until the scar contracture pulling the spine into its deformed position is released. This often requires staged procedures: first, scar release and skin grafting or tissue expansion to restore soft tissue flexibility, then spinal correction once the tethering force has been addressed. In the case of the young man scalded in childhood, staged corrective surgery addressed both the complex kyphoscoliosis and the extensive contractured scar tissue across his back and flank.7PubMed Central. Staged corrective surgery for complex adolescent kyphoscoliosis caused by back scalding during the childhood period Attempting spinal correction without first dealing with the scarring would risk failure of the correction, wound breakdown, or both.
This staged approach applies more broadly to any thoracogenic scoliosis where the underlying cause is still actively pulling on the spine. Whether the driver is a contractured scar, an unresected tumor, or ongoing chest wall asymmetry from fused ribs, the principle is the same: address the thoracic problem first, or at least simultaneously, rather than treating the spinal curve in isolation.