Paeds · rheumatology-musculoskeletal-and-sports
Musculoskeletal examination and the limping child
Also known as pGALS · paediatric Gait Arms Legs Spine · pREMS · paediatric Regional Examination of the Musculoskeletal System · limping child · Kocher criteria · transient synovitis · Perthes disease · Legg-Calve-Perthes disease · slipped capital femoral epiphysis · SUFE · toddler fracture
A fellowship approach to the paediatric musculoskeletal examination and the limping child: pGALS as the bedside screen, pREMS as the regional deep-dive, and the age-stratified differential that turns a limp into a diagnosis — from transient synovitis to Perthes to slipped capital femoral epiphysis, anchored by the Kocher and Caird prediction rules that separate the irritable hip needing aspiration from the one that does not.
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Target exams
Red flags
- Fever above 38.5 degrees Celsius with an irritable hip is septic arthritis until proven otherwise — apply the Kocher criteria and aspirate when the score is high
- Refusal to bear weight, not merely a limp, is the single strongest discriminator between septic arthritis and transient synovitis and it demands urgent workup
- Night pain that wakes a child from sleep, or pain unrelated to activity, raises bone tumour, leukaemia, or osteomyelitis until imaging and bloods prove otherwise
- A limp in a child under three years, or any refusal to walk in a pre-verbal toddler, carries a higher probability of serious disease than the same presentation in an older child
- Slipped capital femoral epiphysis may present with knee pain alone and a normal hip examination — image the hips of any overweight adolescent with unexplained knee or thigh pain
- Bilateral joint involvement, morning stiffness lasting over thirty minutes, or persistent pGALS abnormalities point away from transient synovitis toward juvenile idiopathic arthritis
Life stages
Care settings
Clinical exam formats
Board mappings
- Musculoskeletal medicine - perform the pGALS screen and recognise the limping child
- Acute presentations - the irritable hip and referral of suspected septic arthritis
- Growth and Development - normal motor milestones and their deviations
- Musculoskeletal medicine - apply the Kocher prediction rule and the age-stratified differential of limp
- Rheumatology - distinguish juvenile idiopathic arthritis from transient synovitis using pGALS and pREMS
- Renewed curriculum for first-year trainees from 2027 - Learning goal 6: Clinical management - essential general paediatrics
- Musculoskeletal 10-12
- Acute presentations 10-12
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- 10. Musculoskeletal - musculoskeletal examination and the limping child
- 2. Children presenting with musculoskeletal problems
- 4. Professional skills and knowledge: Patient management
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- General Pediatrics Content Outline - Universal Task 3: Physical Examination
- General Pediatrics Content Outline - Universal Task 5: Patient Management
- Patient Care 4: Clinical Reasoning
- Patient Care 5: Patient Management
- Medical Knowledge 2: Conditions common in pediatric primary care
- Systems-Based Practice 2: Coordinated acute and chronic care
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- Pediatrics: Foundations EPA #5 - Performing a focused physical examination
- Pediatrics: Rheumatology and musculoskeletal applied domain
A four-year-old boy wakes with a limp and a sore left knee after a viral cold last week, he is afebrile, he walks with an antalgic gait but bears weight, and his hip has full passive range apart from some guarding — transient synovitis, the commonest cause of limp in this age. A three-year-old girl is febrile at 39 degrees, will not put her foot to the floor, holds her hip flexed and abducted, and has an ESR of 55 and a white cell count of 15,000 — septic arthritis, and the Kocher score is four. A twelve-year-old overweight boy presents with three weeks of vague knee pain and walks with external rotation of his leg — slipped capital femoral epiphysis, and the knee pain is referred from the hip. The task in each is to screen with pGALS, localise with pREMS, apply the prediction rule, and image before assuming the benign. [7] [8]
Run the pathway as five moves. Screen with pGALS, asking the three questions and watching the gait, because the screen catches child limp has not yet declared. Localise with pREMS when the screen is abnormal, palpating for warmth and effusion and moving each joint through its range. Score the irritable hip with the Kocher and Caird criteria, because the score decides whether to aspirate. Image the hip with ultrasound for effusion and radiographs for bone, because transient synovitis and Perthes look the same until the film is seen. Refer to orthopaedics when the score is high, because a septic hip is a surgical emergency. [1] [4]
Overview & Definition
pGALS, the paediatric Gait Arms Legs Spine screen, is a simple, quick musculoskeletal examination adapted from the adult GALS screen for use in school-age children, and it is designed to be performed by any clinician, not only a rheumatologist. It takes two to three minutes, it begins with three screening questions, and it proceeds through a structured look at the gait, arms, legs, and the spine. The screen is not a diagnosis — it is a flag, and an abnormal finding prompts a more detailed regional examination. [1] [2]
The limping child is the presentation that tests the musculoskeletal screen most urgently, because a limp may be the only sign of a septic joint, a bone tumour, or an unrecognised fracture. A limp is defined as an asymmetrical gait pattern, and in the young child it often appears as a refusal to walk or a favouring of one leg rather than a complaint of pain. The fellowship task is to decide, rapidly and at the bedside, whether the limp is benign and self-limiting or whether it carries a red flag that demands urgent imaging, bloods, and orthopaedic review. [7] [9]
The clinical importance comes from what an unrecognised septic hip does to a child. Bacterial infection of a joint destroys cartilage within hours to days, and a delayed aspiration leads to avascular necrosis, growth disturbance, and lifelong disability. The Kocher prediction algorithm, published in 1999 and validated in 2004, was built precisely to prevent this harm by turning four bedside and laboratory findings into a probability of sepsis that guides the decision to aspirate. [4] [5]
References11ShowHide
- [1]Foster HE, Kay LJ, Friswell M, Coady D, Myers A. Musculoskeletal screening examination (pGALS) for school-age children based on the adult GALS screen. Arthritis and Rheumatism, 2006.PMID 17013854
- [2]Foster HE, Jandial S. pGALS - paediatric Gait Arms Legs and Spine: a simple examination of the musculoskeletal system. Pediatric Rheumatology Online Journal, 2013.PMID 24219838
- [3]Foster HE, Cabral DA. Is musculoskeletal history and examination so different in paediatrics? Best Practice and Research. Clinical Rheumatology, 2006.PMID 16546055
- [4]Kocher MS, Zurakowski D, Kasser JR. Differentiating between septic arthritis and transient synovitis of the hip in children: an evidence-based clinical prediction algorithm. Journal of Bone and Joint Surgery. American Volume, 1999.PMID 10608376
- [5]Kocher MS, Mandiga R, Zurakowski D, Barnewolt C, Kasser JR. Validation of a clinical prediction rule for the differentiation between septic arthritis and transient synovitis of the hip in children. Journal of Bone and Joint Surgery. American Volume, 2004.PMID 15292409
- [6]Caird MS, Flynn JM, Leung YL, Millman JE, D'Italia JG, Dormans JP. Factors distinguishing septic arthritis from transient synovitis of the hip in children. A prospective study. Journal of Bone and Joint Surgery. American Volume, 2006.PMID 16757758
- [7]Payares-Lizano M. The limping child. Pediatric Clinics of North America, 2020.PMID 31779828
- [8]Adamson J, Waterfield T. Fifteen-minute consultation: the limping child. Archives of Disease in Childhood. Education and Practice Edition, 2020.PMID 31255998
- [9]Fischer SU, Beattie TF. The limping child: epidemiology, assessment and outcome. Journal of Bone and Joint Surgery. British Volume, 1999.PMID 10615981
- [10]Myers A, McDonagh JE, Gupta K, Hull R, Barker D, Kay LJ, Foster HE, et al. More cries from the joints: assessment of the musculoskeletal system is poorly documented in routine paediatric clerking. Rheumatology (Oxford), 2004.PMID 15187245
- [11]Smith N, Foster HE, Jandial S. A mixed methods evaluation of the Paediatric Musculoskeletal Matters (PMM) online portfolio. Pediatric Rheumatology Online Journal, 2021.PMID 34108019