Background/Purpose: Confirming the diagnosis of giant cell arteritis (GCA) remains challenging. Available diagnostic tests have limited accuracy and availability. Recently, optic nerve sheath enhancement on magnetic resonance imaging has been reported in patients with GCA. Whether this finding can be documented on ultrasound is unknown. Optic nerve (ON) ultrasound is non-invasive, easy to learn and … Continue reading Optic Nerve Sheath Measurement on Ultrasound: A Novel Diagnostic Test for Giant Cell Arteritis