Radiographs: SI joint
erosion, sclerosis, sacroiliitis, ankylosis
SCLEROSIS, EROSION, SACROILIITIS, ANKYLOSIS, JOINT FUSION
SI joint radiographs were scored according to the mNY grading method (grade 0: normal findings; grade 1: suspicious changes; grade 2: minimum abnormality with some sclerosis, minimal erosion, no marked joint space narrowing; grade 3: unequivocal abnormality—moderate or advanced sacroiliitis with erosion, sclerosis, widening, narrowing, and/or partial joint fusion [ankylosis]; grade 4: severe abnormality [total ankylosis]) [