Table 2.

Positron emission tomography/magnetic resonance imaging findings

Tracer	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5
DaT
Putamina	↓	↓	↓	Norm	↓
Caudate nucleus	Norm	↓	Norm	Norm	Norm
PIB
Frontal lobe	++	+	++	+	–
Parietal lobe	++	++	++	++	–
Occipital lobe	+	+	+	++	–
Temporal lobe	+	++	+	++	–
Basal ganglia	–	–	–	–	–
Cerebellum	–	–	–	–	–
FDG
Frontal lobe	↓	↓	Norm	↓	Norm
Parietal lobe	↓	↓	↓	↓	↓
Occipital lobe	Norm	↓	↓	Norm	↓
Temporal lobe	↓	↓	↓	↓	Norm
Posterior cingulate cortex	Norm	Norm	Norm	↓	Norm
Basal ganglia	↓	↓	↓	Norm	Norm
Cerebellum	Norm	Norm	Norm	Norm	Norm

+ indicates increased uptake of PIB; ++ indicates an apparent increase in PIB uptake; – indicates no apparent uptake of PIB; ↓ indicates decreased uptake of FDG and DaT; Norm indicates normal uptake of FDG and DaT. DaT, dopamine transporter; PIB, Pittsburgh compound B; FDG, fluorodeoxyglucose.