Teen and Adolescent Scoliosis

Adolescent idiopathicno known cause scoliosis (AIS) is the most common type of scoliosis, affecting 2 to 3% of children aged 10 to 18. "Idiopathicno known cause" means the cause is unknown — despite decades of research, no single gene, environmental factor, or developmental trigger has been identified. What is known is that AIS runs in families (about 30% of patients have a first-degree relative with scoliosis) and affects girls more severely than boys (girls are 8 times more likely to have curves that progress to require treatment).

AIS is typically detected during puberty, which is when the rapid growth that drives curve progression occurs. The spine curves laterally (sideways) and rotates, creating the characteristic rib hump visible when bending forward. Most curves develop in the thoracicupper/middle back (upper back) region, though thoracolumbar (upper-to-lower back) and lumbarlower back (lower back) curves are also common.

The Cobb anglecurve measurement (degrees on X-ray) — measured on a standing X-ray — defines severity: mild is 10 to 25 degrees, moderate is 25 to 40 degrees, and severe is above 40 degrees. About 10% of diagnosed adolescents require active treatment (bracing or surgery). The rest are monitored with periodic X-rays until skeletal maturitydone growing.

Bottom line: AIS is common, usually mild, and most teens with scoliosis need monitoring only — not treatment.

The single most important factor in adolescent scoliosis is growth remaining. A 25-degree curve in a 12-year-old who has not yet had their growth spurt is a very different situation than the same curve in a 16-year-old who has finished growing.

Does scoliosis affect height? Yes — scoliosis can reduce standing height because the lateralside-to-side curve and rotation shorten the effective length of the spine. A 50-degree curve can reduce height by approximately 1 to 2 inches. After surgical correction, patients often gain that height back. Teens who are concerned about height should know that scoliosis does not prevent normal growth — it just redirects some of that growth into the curve rather than vertical height.

How do doctors assess growth remaining? The Risser signbone maturity indicator (graded 0 to 5) measures ossification of the iliac crest apophysis — a growth center on the hip bone visible on X-ray. Risser 0 means significant growth remaining, Risser 5 means growth is complete. Girls typically reach Risser 4 to 5 about 2 years after their first period. Boys mature later. The Sanders classification (based on hand X-rays) provides more precise staging for younger patients.

Progression risk by curve and maturity:

A curve between 20 and 29 degrees at Risser 0 to 1 has a 60 to 68% chance of progressing. The same curve at Risser 2 to 4 has only a 23 to 40% chance. For curves above 30 degrees at Risser 0 to 1, progression is nearly certain without intervention (Lonstein & Carlson, JBJS, 1984).

Bottom line: Growth remaining is the key variable. More growth remaining plus larger curve equals higher progression risk — this drives all treatment decisions.

Observation (curves under 25 degrees): Most teens with mild scoliosis are monitored every 4 to 6 months with X-rays during the growth period. If the curve is stable or progressing slowly and the teen is approaching skeletal maturitydone growing, observation alone is sufficient. No treatment needed — just watching.

Bracing (curves 25 to 40 degrees, still growing): Bracing is the standard treatment for moderate curves during growth. The BrAIST trial demonstrated 72% effectiveness at preventing surgical-threshold progression. Full-time bracing (16 to 23 hours/day) with a rigid TLSO (thoracolumbosacral orthosis) is most common. Nighttime-only bracing is an option for single curves under 35 degrees.

Scoliosis-specific exercises: The Schroth method and SEASScientific Exercise Approach to Scoliosis (Scientific Exercise Approach to Scoliosis) are evidence-based exercise programs that can be used alongside observation or bracing. They do not replace bracing for moderate curves but may reduce the need for bracing in milder cases and improve outcomes during bracing. A 2023 meta-analysis showed statistically significant Cobb anglecurve measurement (degrees on X-ray) reduction with Schroth exercises (Ceballos-Laita et al., 2023).

Vertebral body tethering (curves 35 to 65 degrees, still growing): VBTvertebral body tethering (flexible surgery alternative) is a newer, FDA-approved procedure that corrects the curve while preserving spinal flexibility. A flexible cord is attached to screws on the convexthe prominent/sticking-out side side of the curve. As the spine continues to grow, the tethered side grows slower, gradually straightening the curve. It is only suitable for growing patients and is not available at all centers.

Spinal fusionsurgery that joins spine bones together (curves over 45 to 50 degrees): When curves reach surgical threshold, spinal fusionsurgery that joins spine bones together is the definitive treatment. Metal rods and screws straighten and stabilize the curved segment. Modern techniques typically achieve 50 to 70% correction. The fused segment loses flexibility, but most patients return to full activity within 6 to 12 months.

Bottom line: Most teens need observation only. Bracing for moderate curves during growth. Surgery for curves over 45 to 50 degrees. Newer options like VBTvertebral body tethering (flexible surgery alternative) offer a middle ground for the right candidates.

School accommodations: Teens with scoliosis may qualify for accommodations under Section 504 or an IEP depending on their situation. Common accommodations include a second set of textbooks (to avoid carrying a heavy backpack), permission to stand or stretch during class, extended time between classes, and excused absences for medical appointments. A letter from the treating physician is usually sufficient to initiate the accommodation process.

Backpacks: Heavy, one-shoulder backpacks do not cause scoliosis — this is a persistent myth. However, they can worsen pain in teens who already have scoliosis. Use both straps, keep weight under 10 to 15% of body weight, and consider a rolling backpack if the school allows it.

Sports participation: Most teens with scoliosis can and should participate in sports. Exercise strengthens the muscles that support the spine and is associated with better outcomes. There is no evidence that any specific sport worsens scoliosis. Gymnastics, dance, swimming, volleyball, and running are all generally safe. The only restriction is for post-surgical patients during recovery (typically 6 to 12 months before return to contact sports).

Bracing and sports: Most braces are removed during sports and physical activity. This is built into the wearing schedule — if the prescription is 18 hours/day, the 6 brace-free hours are typically allocated to sports, bathing, and social activities. Some sports-specific braces allow activity while providing support.

Body image and mental health: Adolescent scoliosis has a documented impact on self-esteem and body image, particularly for girls. The visible asymmetry (uneven shoulders, rib hump, waist crease) and the experience of wearing a brace can be socially isolating. Research consistently shows that teens with scoliosis have lower body image scores than their peers (Tones et al., Spine, 2006). Peer support — through groups like Curvy Girls or the r/scoliosis community — can be genuinely helpful.

Bottom line: Teens with scoliosis can do almost everything their peers do. Sports are encouraged, school accommodations are available, and the emotional impact deserves as much attention as the physical curve.

Screening at home: The Adams Forward Bend Test is the standard screening tool. Have your child stand with feet together, bend forward at the waist with arms hanging, and look at their back from behind. Any asymmetry — one side of the rib cage or lower back higher than the other — warrants a doctor visit. Schools in some states perform scoliosis screening, but many have discontinued the practice, so home screening during growth spurts is important.

When to get X-rays: If screening shows asymmetry, your pediatrician will order a standing full-spine X-ray. This is the only way to measure the Cobb anglecurve measurement (degrees on X-ray) and determine severity. Do not rely on visual assessment alone — a curve can look dramatic but be mild on X-ray, or look subtle but be moderate.

Choosing a specialist: Pediatric orthopedic surgeons and pediatric spine surgeons are the appropriate specialists for adolescent scoliosis. General orthopedists may not have the scoliosis-specific experience needed for treatment decisions. If surgery is recommended, seek a surgeon who performs at least 50 scoliosis fusions per year — volume matters for outcomes.

Second opinions are normal: If surgery is recommended, getting a second opinion is standard practice and any good surgeon will support this. Different surgeons may have different thresholds for intervention and different approaches (fusion vs. VBTvertebral body tethering (flexible surgery alternative), fusion levels, surgical approach). The Scoliosis Research Society maintains a directory of fellowship-trained spine surgeons.

Your teen's autonomy: As much as possible, involve your teen in treatment decisions. Bracing compliance — the single most important factor in non-surgical treatment — depends almost entirely on the teen's buy-in. Teens who understand why they are wearing the brace and feel ownership over the decision consistently have better outcomes than those who feel it was imposed on them.

Bottom line: Screen at home during growth spurts, see a pediatric spine specialist for curves that need attention, and involve your teen in every decision — their compliance depends on their understanding and buy-in.