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Atlas for the OMERACT thumb base osteoarthritis MRI scoring system (TOMS)
  1. Féline P B Kroon1,
  2. Charles G Peterfy2,
  3. Philip G Conaghan3,
  4. Violaine Foltz4,
  5. Frédérique Gandjbakhch4,
  6. Iris Eshed5,
  7. Harry K Genant6,7,
  8. Mikkel Østergaard8,9,
  9. Monique Reijnierse10,
  10. Johan L Bloem10,
  11. Ida K Haugen11 and
  12. Margreet Kloppenburg1,12
  1. 1 Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
  2. 2 Spire Sciences Inc, Boca Raton, Florida, USA
  3. 3 Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and National Institute for Health Research, Leeds Biomedical Research Centre, Leeds, UK
  4. 4 Department of Rheumatology, Pitié Salpêtriere Hospital, APHP, Université Pierre et Marie Curie, Paris, France
  5. 5 Department of Diagnostic Imaging, Sheba Medical Center, Tel Aviv University, Tel Aviv, Israel
  6. 6 Department of Radiology, University of California San Francisco, San Francisco, California, USA
  7. 7 Department of Medicine, University of California San Francisco, San Francisco, California, USA
  8. 8 Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Glostrup Hospital, Copenhagen, Denmark
  9. 9 Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
  10. 10 Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
  11. 11 Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway
  12. 12 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
  1. Correspondence to Féline P B Kroon; f.kroon.reum{at}


This paper presents an atlas for the Outcome Measures in Rheumatology Clinical Trials (OMERACT) thumb base osteoarthritis MRI scoring system (TOMS). The atlas includes reference images of each grade of each feature that is assessed in TOMS (synovitis grade 0–3, subchondral bone defects grade 0–3, osteophytes grade 0–3, cartilage assessment grade 0–3, subluxation and bone marrow lesions grade 0–3) in the first carpometacarpal and scapho-trapezio-trapezoid joint. The presented reference images can be used to guide scoring of thumb base MRIs in patients with hand osteoarthritis according to the OMERACT TOMS.

  • osteoarthritis
  • magnetic resonance imaging
  • hand osteoarthritis

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  • Contributors FPBK and MK were responsible for the conception of the study. FPBK and IKH were responsible for data acquisition. FPBK, CGP, MR, JLB, IKH and MK were responsible for data analysis, interpretation and drafting of the manuscript. All authors critically revised the manuscript and approved the final version.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement FPBK and MK have access to all data, and these are available upon request.

  • Correction notice This article has been corrected since it first published. The article type has been changed from ’Review' to ’Original article'.

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