Cortico - Basal-ganglionic Degeneration

FDG PET of 47-year-old man with left-sided hemiparkinsonism, apraxia and agnosia (somatotopic and visual)

At the level of the basal ganglia

At the level of the thalamus
Note the decreased metabolism in the entire right hemisphere (opposite the clinically affected side), including the cortex, basal ganglia and thalamus