Background/Purpose: Recently, optic nerve sheath (ONS) enhancement using contrast-enhanced magnetic resonance imaging of the brain and orbits was observed in most patients with biopsy-proven GCA. In addition, we recently showed that ONS diameter (ONSD) and ONS thickness (ONST) measured by ultrasound are increased in patients with new-onset, active GCA. The objective of this study is … Continue reading Optic Nerve Sheath Measurement as a Disease Activity Biomarker in Giant Cell Arteritis