Acute Ischemic Stroke as a Result of Paradoxical Embolus in a Patient with Renal Cell Carcinoma, Intravenous Tumor Thrombus Extension, and Patent Foramen Ovale.

Introduction: Patent foramen ovale is a common congenital cardiac abnormality. An association with acute ischemic stroke is well described. Extension of renal cell carcinoma (RCC) into the adjacent veins is common.