Posterior Circulation Stroke in a Patient With Giant Cell Arteritis: A Case Report.

We present the case of a 95-year-old woman with recently diagnosed giant cell arteritis (GCA) who developed a posterior circulation stroke. She initially experienced visual disturbances and was treated with high-dose corticosteroids after a temporal artery ultrasound confirmed the diagnosis. Two weeks later, she developed sudden left-sided weakness and unsteadiness. Imaging revealed an acute infarct in the left cerebellar hemisphere. During admission, atrial fibrillation was also detected. This case highlights the diagnostic challenge of stroke in GCA, where both vascular inflammation and coexisting cardioembolic risk factors can contribute to cerebrovascular events.