Diffuse bithalamic cerebral edema from acute deep venous thrombosis

Noncontrast head CT (A) shows hypodensities consistent with edema involving both thalami and hyperdensity consistent with thrombus (arrow) in straight sinus. T2-weighted sequence of brain MRI (B) shows edema in both thalami and hyperintense thrombus (dashed arrow) in both vein of Galen and proximal straight sinus. Time-of-flight sequence of brain MRV (C) shows no demonstrable flow in internal cerebral vein, vein of Galen, and straight sinus (oval).