Fig. 9From: MRI of the axial skeleton in spondyloarthritis: the many faces of new bone formationAnkylosis of the facet joints. a Sagittal T1-weighted MR image acquired in a 34-year-old man with SpA shows ankylosis of the facet joints of C2-C3, C6-C7, and C7-Th1 (arrows). b Radiography of the cervical spine confirms this bony fusion of these joints (arrows)Back to article page