Pediatric rheumatology

Clinical characteristics and outcomes of paediatric chronic non-bacterial osteomyelitis: a retrospective cohort study with focus on zoledronic acid

Rheumatology (Oxford)Published Retrospective cohort study

Authors' conclusion

Zoledronic acid was associated with high clinical and radiological response rates and was well tolerated.

Study context

Population
Children diagnosed with chronic non-bacterial osteomyelitis 2014–2024, Royal Children's Hospital, Melbourne (mean age 10.3 years; 70% female)median follow-up 3.7 years
Participants
57 children
Outcome
Effectiveness and tolerability of ZA (clinical and MRI response, adverse effects)
Methodological detailssingle-centre
  • Single-centre

Main finding

As reported in the abstract

Significant clinical improvement with ZA

Zoledronic acid (ZA)

77%

Observational data: associations, not effects.

Further findings

OutcomeValues
Significant radiological improvement on whole-body MRI (10 patients with pre- and post-ZA MRI)ZA 80%
Later required TNFi after ZAZA 3 events

Multifocal disease (whole cohort)

Multifocal disease
86%
Underwent biopsy
63%

Safety

OutcomeValues
Mild, transient flu-like symptomsZA 54%
Serious adverse eventsZA 0 events

Original publication

Clinical characteristics and outcomes of paediatric chronic non-bacterial osteomyelitis: a retrospective cohort study with focus on zoledronic acid. Rheumatology (Oxford). Published 19 August 2026. doi:10.1093/rheumatology/keag442

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