Scoliosis - Diagnosis

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Identifying the Curvature

Proper diagnosis is important. A misjudgment can lead to unnecessary x-rays and stressful treatments in children not actually at risk for progression. Unfortunately, although measurements of curves and rotation are useful, no test exists yet to determine whether a curve will progress.

Inclinometer (Scoliometer). An inclinometer, also known as a scoliometer, measures distortions of the torso. The procedure is as follows:

• The patient bends over, arms dangling and palms pressed together, until a curve can be observed in the upper back (thoracic area).
• The Scoliometer is placed on the back and measures the apex (the highest point) of the upper back curve.
• The patient continues bending until the curve can be seen in the lower back (lumbar area). The apex of this curve is also measured.
• Measurements are repeated twice, with the patient returning to a standing position between repetitions.
• If results show a deformity, the patient will probably need x-rays to determine the extent of the problem.

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Some experts believe the scoliometer would make a useful device for widespread screening. Scoliometers, however, indicate rib cage distortions in more than half of children who turn out to have very minor or no sideways curves. They are therefore not accurate enough to guide treatment.

Imaging Tests

Currently, x-rays are the most cost-effective method for diagnosing scoliosis. Experts hope that accurate, noninvasive diagnostic techniques will eventually be developed to replace some of the x-rays used to monitor the progression of scoliosis. To date, imaging techniques under investigation appear to be fairly accurate for detecting scoliosis in the upper back (the thoracic region), but not scoliosis in the lower back (the lumbar region).

X-Rays. If screening indicates scoliosis, the child may be sent to a specialist who takes an initial x-ray and monitors the child every few months using repeated x-rays. X-rays are essential for an accurate diagnosis of scoliosis:

• They reveal the degree and severity of scoliosis.
• They show other spinal abnormalities, including kyphosis (hunchback) and hyperlordosis (swayback).
• X-rays help the doctor determine whether skeletal growth has reached maturity.
• X-rays taken when patients are bending forward can also help differentiate between structural and nonstructural scoliosis. Structural curves persist when a person bends over, and nonstructural curves tend to disappear. (Muscle spasms or spinal growths may sometimes cause nonstructural scoliosis that shows a curve on bending.)
• Children and young adolescents who have mild curves, and older adolescents, who have more severe curvatures but whose growth has stopped or slowed, need x-rays every few months to detect increasing severity. Young people who are diagnosed with scoliosis should keep their x-rays indefinitely in case they develop back problems later in adulthood and need to be re-examined.