A diagnosis of ischemic optic neuropathy due to silent giant cell arteritis was made. She was admitted in the hospital and was given high dose of steroids (I/V methyl prednisolone 500mg stat and prednisolone 80mg/day)
Temporal artery biopsy was performed and showed infiltration of the tunica adeventitia with chronic inflammtory infiltrate including giant cells (Fig 2), confirming the diagnosis of giant cell arteritis.