Scoliosis in Children

The Importance of Early Assessment of Predisposition Through Sagittal Profile Analysis

Scoliosis is a three-dimensional deformity of the spine characterised by lateral curvature and rotation of the vertebrae. It most commonly develops during childhood and adolescence, when the spine is undergoing active growth. In its early stages, the condition often progresses without pain or obvious symptoms, which makes timely diagnosis particularly important.

In modern paediatric orthopaedics, increasing attention is paid not only to identifying established scoliosis, but also to assessing a child’s predisposition to developing a scoliotic deformity. One of the most important elements of this assessment is the analysis of the sagittal profile of the spine.

The Sagittal Profile as a Biomechanical Basis of Spinal Stability

The normal spine has physiological curves in the sagittal plane, including cervical and lumbar lordosis, as well as thoracic kyphosis. These curves ensure optimal distribution of mechanical loads and contribute to spinal stability during growth.

Some children have a flattened or reduced sagittal profile, particularly in the thoracic region. Reduced thoracic kyphosis may lead to lower mechanical stability of the spine and increase the risk of developing a rotational deformity. This condition may be regarded as a predisposing factor for scoliosis, especially during periods of rapid growth.

Although an accurate assessment of the sagittal profile should be performed by a specialist in paediatric orthopaedics, parents can also observe certain signs that provide useful information about the child’s posture and spinal curves. Regular observation is particularly important during periods of rapid growth.

How Parents Can Recognise the Early Signs of Scoliosis

Scoliosis in children often develops gradually and usually does not cause pain in its early stages. For this reason, many parents do not notice the change immediately. However, there are several early signs that may be identified before the curvature becomes more pronounced.

Regular observation of a child’s posture is an important part of early prevention.

Signs Parents May Notice

The most common early signs of scoliosis include:

• one shoulder appears higher than the other
• one shoulder blade protrudes more prominently
• an uneven waistline
• unequal distance between the arms and the body
• a slight leaning of the body to one side

Sometimes these changes are very subtle and are easiest to notice when the child is wearing underwear and standing calmly in an upright position.

Functional and Structural Scoliosis

Not every lateral curvature of the spine represents true structural scoliosis. In children, functional spinal curvatures are also common and may have a different cause and prognosis.

Functional Scoliosis

Functional scoliosis is usually caused by:

• postural habits
• muscle imbalance
• differences in leg length
• pelvic tilt

With this type of curvature, there are no structural changes in the vertebrae, and the spine may straighten when the body position changes.

Structural Scoliosis

Structural scoliosis is characterised by:

• a persistent lateral deformity
• rotation of the vertebrae
• asymmetry of the ribs

This type of scoliosis requires closer monitoring, particularly during periods of growth.

When Is an X-ray Needed if Scoliosis Is Suspected?

X-ray imaging is an important diagnostic tool in the assessment of scoliosis, but it is not required in every case. The decision to perform imaging is made after a clinical orthopaedic examination.

When Is X-ray Imaging Recommended?

X-ray imaging may be recommended when:

• there are clinical signs of structural scoliosis
• asymmetry is observed during the forward-bending test
• the curvature appears fixed
• progression is suspected

When Can an X-ray Be Avoided?

In many children with:

• a functional spinal curvature
• postural abnormalities
• no vertebral rotation

clinical observation may initially be appropriate without immediate X-ray imaging.

Conclusion

Assessment of the sagittal profile of the spine is an important part of the modern orthopaedic approach to the early diagnosis of spinal deformities in children. The physiological curves of the spine, including thoracic kyphosis and lumbar lordosis, play a key role in maintaining biomechanical stability and ensuring an even distribution of mechanical loads during growth.

Changes in this balance, whether expressed as flattening or an increase in the physiological curves, may create asymmetric loading of the spinal segments and increase the risk of developing a scoliotic deformity. For this reason, careful analysis of the sagittal profile makes it possible to identify children who may be predisposed to scoliosis even before a clearly defined structural deformity appears.

Early recognition of these biomechanical factors allows timely monitoring, preventive measures and targeted exercises that support the healthy development of the spine. In this way, assessment of sagittal balance becomes a key tool for the early prevention and management of spinal curvatures in children.