How would you approach a patient with new temporal headache, temporal artery tenderness and TA biopsy with mild thickening, but normal inflammatory markers?

Some more information is needed. Is this bilateral or unilateral and if the latter is there a potential other cause? Was this patient started on prednisone for presumed GCA prior to obtaining the temporal artery biopsy and if so how long before? When were the “inflammatory markers” measured relative...