IMAGING IN ACUTE #STROKE DWI hyperintensity and changes in ADC values can be found within minutes from the onset of ischaemia. Echo planer imaging (EPI) has high sensitivity and specificity in stroke diagnosis, but a negative result does not exclude a vascular aetiology. Stroke in the posterior circulation is more frequently DWI negative than in the anterior circulation (34.9% versus 15.3%, respectively; p = 0.0019) Figures a. Increased signal intensity on DWI in the territory of the right MCA,

The causes of basal ganglia T2 hyperintensity: 1...lymphoma 2...ischemia 1_hypoxic-ischemic encephalopathy 2_venous infarction (internal cerebral vein thrombosis) 3...neurodegenerative 1_autoimmune encephalitis (e.g. anti-D2 dopamine receptor encephalitis, anti-CV2 encephalitis) 2 2_Creutzfeldt-Jakob disease 4...metabolic 1_extrapontine myelinolysis 2_Huntington disease: especially caudate heads 3_methylmalonic acidemia 4_mitochondrial diseases (e.g. Leigh disease) 5_Wilson disease 6_hepatic enc