Low back pain in youth: Recognizing red flags
Although low back pain in children and teens is usually benign, recognizing red flags that indicate the need for imaging, referral, bracing, or surgery is critical.
PRACTICE RECOMMENDATIONS
› Be aware that low back pain is rare in children < 7 years but increases in incidence as children near adolescence. A
› Consider imaging in the setting of bony tenderness, pain that awakens the patient from sleep, or in the presence of other “red flag” symptoms. A
› Consider spondylolysis and spondylolisthesis in adolescent athletes with low back pain lasting longer than 3 to 6 weeks. A
Strength of recommendation (SOR)
A Good-quality patient-oriented evidence
B Inconsistent or limited-quality patient-oriented evidence
C Consensus, usual practice, opinion, disease-oriented evidence, case series
Imaging: Know when it’s needed
Although imaging of the lumbar spine is often unnecessary in the presence of acute low back pain in children, always consider imaging in the setting of bony tenderness, pain that wakes a patient from sleep, and in the setting of other red flag symptoms (see TABLE 2). Low back pain in children that is reproducible with lumbar extension is concerning for spondylolysis or spondylolisthesis. If the pain with extension persists beyond 3 to 6 weeks, order imaging starting with radiographs.2,39
Traditionally, 4 views of the spine—anteroposterior (AP), lateral, and oblique (one right and one left)—were obtained, but recent evidence indicates that 2 views (AP and lateral) have similar sensitivity and specificity to 4 views with significantly reduced radiation exposure.2,39 Because the sensitivity of plain films is relatively low, consider more advanced imaging if spondylolysis or spondylolisthesis is strongly suspected. Recent studies indicate that magnetic resonance imaging (MRI) may be as effective as computed tomography (CT) or bone scan and has the advantage of lower radiation (FIGURE 1).2,22
Similarly, order radiographs if there is > 10° of asymmetry noted on physical exam using a scoliometer.15,23 Calculate the Cobb angle to determine the severity of scoliosis. Refer patients with angles ≥ 20° to a pediatric orthopedist for monitoring of progression and consideration of bracing (FIGURE 2).23,34 For patients with curvatures between 10° and 19°, repeat imaging every 6 to 12 months. Because scoliosis is a risk factor for spondylolysis, evaluate radiographs in the setting of painful scoliosis for the presence of a spondylolysis.34,35
If excessive kyphosis is noted on exam, order radiographs to evaluate for Scheuermann disease. Classic imaging findings include Schmorl nodes, vertebral endplate changes, and anterior wedging (FIGURE 3).17,18
In the absence of the above concerns, defer imaging of the lumbar spine until after adequate rest and rehabilitation have been attempted.
Continue to: Treatment typically involves restor physical therapy
