Which renal findings suggest ankylosing spondylitis (AS)?

Updated: Feb 02, 2021
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Amyloidosis is a very rare complication of AS in patients with severe, active, and long-standing disease. These patients generally have active spondylitis, active peripheral joint involvement, a higher erythrocyte sedimentation rate (ESR), and an increased C-reactive protein (CRP) level. This may result in renal dysfunction with proteinuria and renal insufficiency or failure. Immunoglobulin A (IgA) nephropathy has been reported in association with AS.

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