until improvement is noted or a cause is determined If the limp persists beyond to weeks without a diagnosis, further workup or consultation with a specialist is indicated Suggested Readings and Key References Bartolini A, Aparisi Gomez MP, Cirillo M, et al Imaging of the limping child Euro J Radiol 2018;109:155–170 Cruz CI, Vieira RL, Mannix RC, et al Point-of-care hip ultrasound in a pediatric emergency department Am J Emerg Med 2018;36(7):1174–1177 Mitchell PD, Viswanath A, Obi N, et al A prospective study of screening for musculoskeletal pathology in the child with a limp or pseudoparalysis using erythrocyte sedimentation rate, C-reactive protein and MRI J Child Orthop 2018;12(4):398–405 Principi N, Esposito S Kingella kingae infections in children BMC Infect Dis 2015;15:260 doi:10.1186/s12879-015-0986-9 Roderick MR, Shah R, Rogers V, et al Chronic recurrent osteomyelitis (CRMO) —advancing the diagnosis Pediatr Rheumatol Online J 2016;14(1):47 Safdar NM, Rigsby CK, Iyer RS, et al ACR Appropriateness Criteria® acutely limping child up to age J Am Coll Radiol 2018;15(11S):S252–S262