How would you approach management of a young woman referred for isolated anterior uveitis (now resolved), in the absence of systemic manifestations or end-organ involvement, but with serologies notable for strongly positive PR3 (negative c-ANCA)?

This is a challenging case. While up to 50% of anterior uveitis are idiopathic, and uveitis is relatively uncommon in GPA (<5-10%, episcleritis and scleritis are the most common ocular manifestations. The PR3 antibody is quite specific. Therefore, I would have a high index of suspicion that the uvei...