fig1

Figure 1. Temporal artery ultrasound of a patient with GCA at different disease stages. (A) At disease diagnosis with the LCSTA showing a significant halo sign (baseline); (B) At disease remission with no halo sign found in the LCSTA (6 months of follow-up); (C) At disease relapse with the LCSTA showing a halo sign (9 months of follow-up). IMT measurements are shown in yellow. GCA: Giant cell arteritis; IMT: intima-media thickness; LCSTA: left common superficial temporal artery.