Early diagnosis of Creutzfeldt-Jakob disease (CJD) patients is often challenging due to the low sensitivity of the current clinical diagnostic criteria. We describe MRI and dual-phase 18F-FP-CIT PET findings in 2 cases of sporadic CJD presenting different clinical phenotypes (Heidenhain variant and corticobasal syndrome). Our case series suggest that dual-phase FP-CIT-PET findings may improve the diagnosis of CJD by combining the perfusion patterns in early phase with the dopamine transporter density in delayed phase. Familiarity with these dual-phase FP-CIT PET findings is helpful for early correct diagnosis of CJD.
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