How do you approach a patient found to have a coronary lesion suggestive of vasculitis on coronary CT?

I am not sure what findings are considered “suggestive of vasculitis on coronary CT”. Vasculitis in the coronary arteries is quite rare but can be seen in several vasculitides. There is a big difference in seeing angiographic changes atypical for atherosclerosis (which I assume is what is meant by this question) in a) a patient with a known form of vasculitis; versus b) a patient not known to have vasculitis. In the first situation, the post-test probability is much higher for vasculitis but I w...