When to request a paediatric rheumatology opinion

The child with joint pain in primary care

Joint pains are a common reason for children to present to primary care. The differential diagnosis is large including some diseases that do not primarily affect the musculoskeletal system. Although the cause for many patients will be benign and self-resolving, in rare cases the diagnosis is associated with long-term morbidity and mortality if not detected early and appropriately treated. These include primary and secondary malignancies, septic arthritis, osteomyelitis, inflammatory arthritis, slipped upper femoral epiphysis (SUFE) and non-accidental injury. We highlight the importance of a thorough history and directed yet comprehensive examination. A diagnostic algorithm is provided to direct primary care physicians' clinical assessment and investigation with the evidence base where available. In many cases, tests are not required, but if there is suspicion of malignancy, infection or inflammatory conditions, laboratory tests including full blood count, blood film, erythrocyte sedimentation rate, C-reactive protein and lactate dehydrogenase help to support or exclude the diagnosis. Autoimmune tests, such as antinuclear antibodies and rheumatoid factor, have no diagnostic role in juvenile idiopathic arthritis; therefore, we advise against any form of 'rheumatological/autoimmune disease screen' in primary care. Imaging does have a place in the diagnosis of joint pains in children, with plain radiographs being most appropriate for suspected fractures and SUFE, whilst ultrasound is better for the detection of inflammatory or infective effusions. The appropriate referral of children to paediatric rheumatologists, oncologists, orthopaedic surgeons and the emergency department are discussed.

Delay in access to appropriate care for children presenting with musculoskeletal symptoms and ultimately diagnosed with juvenile idiopathic arthritis

OBJECTIVE

To document pathways of care, management, and interval from onset of symptoms to first pediatric rheumatology multidisciplinary team (PRhMDT) assessment for children with incident juvenile idiopathic arthritis (JIA).

METHODS

We conducted a retrospective observational study of children with incident JIA over a 3-year period.

RESULTS

The study included 152 patients with JIA (87 females). The median interval from symptom onset to first PRhMDT assessment was 20 weeks (range 0-416), with significant variation between JIA subtypes (P = 0.0097); children with extended oligoarticular JIA had the longest interval (median 60 weeks, range 12-320). Prior to pediatric rheumatology assessment, many children had referrals to multiple secondary care specialties and had been subjected to multiple and often invasive procedures including arthroscopy/synovial biopsy (18 [11.8%] of 152), but none were referred for ophthalmologic screening, physical therapy, or nursing input and a diagnosis of JIA was rarely made (98%). At first PRhMDT assessment, most patients had untreated active disease with active joint count >or=1 (135 [89%] of 152), restricted joint count >or=1 (135 [89%] of 152), and functional disability by Child Health Assessment Questionnaire score >0 (53 [68%] of 118); 1 child had undetected uveitis. Following PRhMDT assessment, interventions were invariably indicated, including joint injections (69 [45%] of 152), methotrexate (49 [32%] of 152), and physical therapy programs (all patients).

CONCLUSION

Delay in access to pediatric rheumatology assessment is common with complex pathways of referral. Many children were subjected to inappropriate invasive investigations and many had prolonged untreated active disease at the initial PRhMDT assessment. This delay is likely to affect long-term outcome and warrants further exploration.

Is musculoskeletal history and examination so different in paediatrics?

Musculoskeletal (MSK) complaints in children and adolescents are common. The differential diagnosis is broad and based predominantly on clinical assessment. The skills both for eliciting history and for examination require understanding of the child/young person's specific emotional and cognitive developmental stage; interpretation of the findings requires knowledge of normal (and abnormal) motor and musculoskeletal growth and development. We specifically describe the different approach, unique skills and knowledge required by all clinicians who assess children and adolescents with MSK complaints; children and adolescents are not 'just little adults'. We emphasize the importance of clinical competence in ensuring that patients with juvenile idiopathic arthritis are diagnosed early and referral to specialist centres is not delayed with consequential suboptimal management and outcome. There is evidence that physician clinical skills in MSK assessment are inadequate, probably as a result of systemic deficiencies in the education process. Current and proposed solutions are discussed.