{Reference Type}: Case Reports {Title}: An Abysmal Quadrad: A Rare Case of Ankylosing Spondylitis, Ulcerative Colitis, and Takayasu Aortoarteritis Complicated by Secondary Renal Amyloidosis. {Author}: Banker H;Prasad P;Kumar A;Mahajan S;Kumar R;Batra V; {Journal}: Indian J Nephrol {Volume}: 34 {Issue}: 3 {Year}: 2024 May-Jun 暂无{DOI}: 10.4103/ijn.ijn_294_23 {Abstract}: Ankylosing Spondylitis (AS) is a chronic inflammatory arthritis that typically manifests in young males and may present with extra-articular manifestations. Takayasu aortoarteritis (TA) is a large vessel vasculitis that predominantly affects young and middle-aged females. Despite the limited number of studies examining the potential association between these two diseases, we report a unique case of an individual with ankylosing spondylitis and ulcerative colitis who subsequently developed Takayasu aortoarteritis. This progression ultimately led to the development of secondary renal amyloidosis, attributed to a combination of inflammatory pathologies.