Evaluation of Bilateral Leg Pain in Young Children

Key History and Physical Examination Elements

The American College of Radiology recommends obtaining a detailed history of the timing and pattern of pain episodes, including when the pain started, how long each episode lasted, and whether the pain is intermittent or constant, in a child presenting with bilateral leg pain and refusal to walk 1, 2
A thorough physical examination should include observation of gait, lower extremity examination, and neurological assessment to identify signs of trauma, infection, or developmental abnormalities 1, 4, 5
The American College of Radiology suggests that the physical examination should assess for swelling, redness, or deformity, and palpate for areas of tenderness along bones and joints 1, 5

The American College of Radiology recommends initial imaging with focused radiographs of the tibia/fibula, as these are the most common sites of occult fractures in young children 1, 5
Laboratory studies, including complete blood count (CBC), erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP), should be considered if an infectious or inflammatory process is suspected 1, 4
Advanced imaging, such as MRI or ultrasound, may be necessary if initial evaluation is negative and symptoms persist 1, 5

The American College of Radiology lists trauma-related causes, including occult or toddler's fracture, stress fracture, and soft tissue injury, as potential differential diagnoses for bilateral leg pain in young children 1, 3, 5
Infectious/inflammatory causes, such as septic arthritis and osteomyelitis, should also be considered 1, 4
Developmental causes, including developmental dysplasia of the hip, and neurological causes, such as cerebral palsy and spinal cord abnormalities, should also be included in the differential diagnosis 1, 4, 6

The American College of Radiology recommends observation and reassurance for children with normal radiographs and improving symptoms, with follow-up in 1-2 weeks if symptoms persist 1, 5
For children with normal radiographs and persistent symptoms, repeat clinical examination, follow-up radiographs, and advanced imaging should be considered 1, 5
Orthopedic consultation is recommended for fractures or joint abnormalities, and infectious disease consultation is recommended for suspected infection 1, 4, 6

Assuming normal radiographs rule out fracture, as approximately 10% of tibial fractures are only visible on follow-up radiographs 1, 5
Focusing only on the site of reported pain, as young children may not accurately localize pain, and hip pathology can present as knee or thigh pain 1, 4
Missing signs of infection, such as fever and inflammatory markers, when evaluating unexplained limping 1, 4
Inadequate follow-up, as serious conditions like spinal discitis have been missed on initial evaluation 1, 5