PR3-ANCA levels of >10 U/ml at 18 and 24 months were predictive of relapse within 5 years. In patients who switched to azathioprine maintenance, relapse was associated with a positive cANCA titer ...

And subsequently, several days later, her anti-PR3 titers return positive at 340 with a C-ANCA titer of 1:320. And the remainder of her serology is most notably the anti-GBM, but also ANA ...