“…Likewise, in a recent study, we found that in 7 (44%) of 16 cases CP was associated with other autoimmune conditions, namely ANCA-positive renal disease and autoimmune tyroiditis (7). Finally, various case reports have described an association between CP and numerous autoimmune diseases including well-defined small-and medium-vessel vasculitis (Wegener's granulomatosis, polyarteritis nodosa, Henoch-Schoenlein purpura) (9 -11), unclassifiable "systemic vasculitis" (8,12), aortitis (13), or different types of immune-mediated glomerulonephritis (membranous, membrano-proliferative, and rapidly progressive glomerulonephritis) (18,19). Ankylosing spondylitis, a condition sometimes linked to ascending aortitis, has also been reported to be associated with CP (12,20,21), whereas the association with rheumatoid arthritis and systemic lupus erythematosus is uncommon (7,22).…”