What caused this symmetrical bilateral thalami hypodensity on the CT?
Venous cerebral thrombosis
What is most common acquired underlying cause of central cerebral venous infarct in children?
Inflammatory process such as sinusitis or mastoiditis.
Uniform FLAIR hyper intensity of both thalami corresponding to low signal on T1 and restricted diffusion on DWI consistent with acute ischemia.
MRV MIP reconstructed images demonstrating complete occlusion of right transverse sinus, straight sinus and bilateral inferior cerebral veins consistent with central cerebral venous thrombosis.