Limping is a common problem in children and adolescents. The differential diagnosis of limping is extensive and includes numerous abnormalities of the lower extremity and spine. Some of the common conditions that can cause a child to limp are as follows:

Many imaging studies can be used to evaluate the bones and soft tissues, but conventional radiography is the primary imaging modality for most clinical conditions that cause a child to limp. Plain radiographs usually are obtained first because they are sensitive and specific for a wide range of bone pathology. More sophisticated imaging modalities including radionuclide scintigraphy (bone scan), computed tomography (CT), ultrasonography, and magnetic resonance (MR) imaging are reserved for specific clinical situations. Each of these imaging modalities has specific advantages and disadvantages. It is the aim of this review to guide the pediatrician in selecting and interpreting the appropriate imaging modality for a variety of common disorders that produce limping in children.