Registry for chronic nonbacterial osteomyelitis

CHronic Nonbacterial Osteomyelitis International Registry (CHOIR)

Seattle Children's Hospital · NCT04725422

This study is creating a registry to track how children and teens with chronic nonbacterial osteomyelitis respond to different treatments over time to help improve their care.

Quick facts

Study typeObservational
Enrollment2000 (estimated)
AgesN/A to 21 Years
SexAll
SponsorSeattle Children's Hospital (other)
Locations1 site (Seattle, Washington)
Trial IDNCT04725422 on ClinicalTrials.gov

What this trial studies

This study aims to create a prospective registry for chronic recurrent multifocal osteomyelitis (CRMO) and chronic nonbacterial osteomyelitis (CNO) to better understand the disease's natural history and patient responses to various treatments over a decade. It focuses on children and adolescents affected by this autoinflammatory bone disease, which can lead to serious complications if not treated properly. The registry will collect data on clinical assessments, imaging studies, and treatment outcomes to standardize care and improve management strategies for affected patients.

Who should consider this trial

Good fit: Ideal candidates for this study are children and adolescents aged 21 years or younger who exhibit bone edema on MRI and meet specific diagnostic criteria.

Not a fit: Patients with a history of malignancy or current infectious osteomyelitis will not benefit from this study.

Why it matters

Potential benefit: If successful, this registry could lead to improved treatment protocols and outcomes for patients with chronic nonbacterial osteomyelitis.

How similar studies have performed: Other studies have shown success in establishing disease registries for similar conditions, indicating a potential for valuable insights and advancements in treatment.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* \- Age at enrollment is equal to or younger than 21 years of age
* Presence of bone edema on STIR or T2 fat saturation sequence on MRI within 12 weeks of enrollment
* Whole body imaging evaluation (either WB MRI or bone scintigraphy)
* Bone biopsy to exclude infection or malignancy unless bone lesions follow typical distribution or there is IBD, psoriasis, or palmar plantar pustulosis

Exclusion Criteria:

* \- History of or current malignancy
* Current infectious osteomyelitis
* Contraindication to the selected treatment agent

Where this trial is running

Seattle, Washington

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Chronic Nonbacterial Osteomyelitis, Chronic Recurrent Multifocal Osteomyelitis

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.