Developing a magnetic resonance imaging scoring system for peripheral psoriatic arthritis.
We describe the first steps in developing an OMERACT magnetic resonance imaging (MRI) scoring system for peripheral psoriatic arthritis (PsA). A preexisting MRI dataset (finger joints) from 10 patients with PsA was scored by 4 readers for bone erosion, bone edema, synovitis, tendinopathy, and extracapsular features of inflammation (including enthesitis) according to specified criteria. Scoring reliability between readers was moderate to high for bone edema and erosion, but lower for soft tissue inflammation. Measures to improve reliability for future exercises will include reviewing definitions of pathological features and prior reader calibration.
McQueen
Fiona
F
Department of Rheumatology, Auckland University, Auckland, New Zealand. f.mcqueen@auckland.ac.nz
Lassere
Marissa
M
Bird
Paul
P
Haavardsholm
Espen A
EA
Peterfy
Charles
C
Conaghan
Philip G
PG
Ejbjerg
Bo
B
Genant
Harry
H
O'Connor
Philip
P
Emery
Paul
P
Østergaard
Mikkel
M
D015535:Arthritis, Psoriatic / Q000145:classification / Q000473:pathology*; D002138:Calibration; D005384:Finger Joint / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015588:Observer Variation; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013585:Synovitis / Q000473:pathology*; D052256:Tendinopathy