De Miguel E, et al. - Researchers sought to determine if there exists a correlation between the increase in the intima-media thickness (IMT) in arteriosclerotic disease and increase in the IMT in temporal arteries (TAs) and if that could mimic the US GCA halo sign. They found that atherosclerotic disease with a carotid IMT >0.9 mm increases the TA IMT and might mimic the halo sign. Given the common prevalence of atherosclerosis in this age group, they put forth a cut-off of TA IMT >0.34 mm in at least two branches to minimize false positives in a GCA diagnosis.