What is the utility in repeating a temporal ultrasound (US) in a previously US diagnosed positive GCA patient who has received treatment and is presenting with recurrent GCA symptoms?  

While TA ultrasound may have a role in the assessment of disease relapse, currently there is little evidence to understand its utility in this area. It is well known that the halo sign is steroid responsive and multiple studies have shown that the halo sign recedes within the first several weeks of ...