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01.09.2012 | Original Article

MRI of the wrist in juvenile idiopathic arthritis: proposal of a paediatric synovitis score by a consensus of an international working group. Results of a multicentre reliability study

verfasst von: Maria Beatrice Damasio, Clara Malattia, Laura Tanturri de Horatio, Chiara Mattiuz, Angela Pistorio, Claudia Bracaglia, Domenico Barbuti, Peter Boavida, Karen Lambot Juhan, Lil Sophie Mueller Ording, Karen Rosendahl, Alberto Martini, GianMichele Magnano, Paolo Tomà

Erschienen in: Pediatric Radiology | Ausgabe 9/2012

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Abstract

Background

MRI is a sensitive tool for the evaluation of synovitis in juvenile idiopathic arthritis (JIA).

Objective

The purpose of this study was to introduce a novel MRI-based score for synovitis in children and to examine its inter- and intraobserver variability in a multi-centre study.

Materials and methods

Wrist MRI was performed in 76 children with JIA. On postcontrast 3-D spoiled gradient-echo and fat-suppressed T2-weighted spin-echo images, joint recesses were scored for the degree of synovial enhancement, effusion and overall inflammation independently by two paediatric radiologists. Total-enhancement and inflammation-synovitis scores were calculated.

Results

Interobserver agreement was poor to moderate for enhancement and inflammation in all recesses, except in the radioulnar and radiocarpal joints. Intraobserver agreement was good to excellent. For enhancement and inflammation scores, mean differences (95 % CI) between observers were −1.18 (−4.79 to 2.42) and −2.11 (−6.06 to 1.83). Intraobserver variability (reader 1) was 0 (−1.65 to 1.65) and 0.02 (−1.39 to 1.44).

Conclusion

Intraobserver agreement was good. Except for the radioulnar and radiocarpal joints, interobserver agreement was not acceptable. Therefore, the proposed scoring system requires further refinement.

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Titel: MRI of the wrist in juvenile idiopathic arthritis: proposal of a paediatric synovitis score by a consensus of an international working group. Results of a multicentre reliability study
verfasst von: Maria Beatrice Damasio
Clara Malattia
Laura Tanturri de Horatio
Chiara Mattiuz
Angela Pistorio
Claudia Bracaglia
Domenico Barbuti
Peter Boavida
Karen Lambot Juhan
Lil Sophie Mueller Ording
Karen Rosendahl
Alberto Martini
GianMichele Magnano
Paolo Tomà
Publikationsdatum: 01.09.2012
Verlag: Springer-Verlag
Erschienen in: Pediatric Radiology / Ausgabe 9/2012
Print ISSN: 0301-0449
Elektronische ISSN: 1432-1998
DOI: https://doi.org/10.1007/s00247-012-2392-4

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MRI of the wrist in juvenile idiopathic arthritis: proposal of a paediatric synovitis score by a consensus of an international working group. Results of a multicentre reliability study