Fig. 1Plain radiographs of the SI joint demonstrating grade 2 bilateral sacroiliitis. The film shows mild subchondral sclerosis and irregularities of the joint surfaces in both SI joints.
Fig. 2(A) Light microscopy of a glomerulus demonstrating expansion of the mesangial matrix with mesangial hypercellularity (hematoxylin-eosin stain, ×400). (B) Immunofluorescence microscopy demonstrating anti-IgA intense staining within glomerular mesangium (fluorescence microscopy, ×400).
Table 1Studies of IgA nephropathy in patients with ankylosing spondylitis treated with various TNF inhibitors