Spondyloarthritis & psoriatic arthritis

Discrepancies between routine sacroiliac joint MRI reporting and current expert recommendations in patients with spondyloarthritis

RMD OpenPublished Retrospective cross-sectional study

Authors' conclusion

This study demonstrated a large gap between the clinical practice of reporting SIJ MRIs and recent reporting recommendations.

Study context

Population
Patients diagnosed with spondyloarthritis (SpA) in clinical registries in five European countries (EuroSpA), with an available sacroiliac joint (SIJ) MRI and local MRI report40 years±13, 492 men
Participants
913 patients
Exposure
Local radiologists' routine SIJ MRI reports vs central SpA expert readings
Outcome
Whether local SIJ MRI reports state what ASAS recommends (MRI indicative of SpA; presence/absence of BME, erosions, fat lesions), and agreement between local and central readers
Methodological detailsmultinational (five European countries, EuroSpA Collaboration), central reading by two readers, descriptive statistics
  • Multinational (five European countries, EuroSpA Collaboration)
  • Central reading by two readers
  • Descriptive statistics

Main finding

As reported in the abstract

Content of local SIJ MRI reports
GroupValueStated whether MRI overall indicative of SpAPresence/absence of BME mentionedPresence/absence of erosions mentionedPresence/absence of fat lesions mentioned
Local readers24%24%88%48%29%

Local readers

Value24%
Stated whether MRI overall indicative of SpA24%
Presence/absence of BME mentioned88%
Presence/absence of erosions mentioned48%
Presence/absence of fat lesions mentioned29%

Observational data: associations, not effects.

Further findings

OutcomeCentral readers
Lesions reported as present, local vs central readers
Inflammatory lesions36%
Structural lesions50%
  • Lesions reported as present, local vs central readers: Local readers Inflammatory lesions 46% · Structural lesions 33%

Original publication

Discrepancies between routine sacroiliac joint MRI reporting and current expert recommendations in patients with spondyloarthritis. RMD Open. Published 17 December 2025. doi:10.1136/rmdopen-2025-006316

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