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The limping child: evaluation and diagnosis
1University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
Insights
A limp in children requires a structured orthopedic evaluation. Early C-reactive protein testing and imaging like X-rays help diagnose serious conditions promptly.
Area of Science:
- Pediatric Orthopedics
- Gait Analysis
- Diagnostic Imaging
Background:
- Limping is a frequent pediatric orthopedic complaint.
- Numerous potential diagnoses exist, necessitating an organized evaluation approach.
- Some causes of pediatric limp require urgent intervention.
Purpose of the Study:
- To outline an organized approach for evaluating pediatric limp.
- To guide orthopedists in selective diagnostic testing.
- To emphasize the importance of gait understanding in diagnosis.
Main Methods:
- Directed history and physical examination.
- Development of a differential diagnosis based on limp characteristics, age, and affected site.
- Selective use of laboratory tests and imaging.
Main Results:
- C-reactive protein assay is a sensitive early indicator for musculoskeletal infections.
- Plain radiography is the initial imaging modality of choice.
- Ultrasonography is useful for evaluating irritable hip and guiding aspiration.
Conclusions:
- An organized approach integrating gait knowledge, targeted examination, and selective testing is crucial for pediatric limp evaluation.
- Laboratory tests and imaging play key roles in diagnosing urgent conditions like infections and inflammatory arthritis.
Abstract:
A limp is a common reason for a child to present to the orthopaedist. Because of the long list of potential diagnoses, some of which demand urgent treatment, an organized approach to evaluation is required. With an understanding of normal and abnormal gait, a directed history and physical examination, and the development of a differential diagnosis based on the type of limp, the patient's age, and the anatomic site that is most likely affected, the orthopaedist can take a selective approach to diagnostic testing. Laboratory tests are indicated when infection, inflammatory arthritis, or a malignant condition is in the differential diagnosis. The C-reactive protein assay is the most sensitive early test for musculoskeletal infections; an abnormal value rapidly returns to normal with effective treatment. Imaging should begin with plain radiography. Ultrasonography is particularly valuable in assessing the irritable hip and guiding aspiration, if necessary.