Fig. 1.

A T2 axial FLAIR MRI demonstrating parieto-occipital atrophy in a patient with PCA. B Fluorodeoxyglucose (FDG)-positron emission tomography (PET) scans with statistical maps showing regions of significant hypometabolism relative to age-matched controls (GE cortex ID): i PCA patient with predominantly right occipital-parietal-temporal hypometabolism with prominent environmental agnosia and dressing apraxia and ii PCA patient with predominantly left occipital-parietal-temporal hypometabolism with prominent Gerstmann features including acalculia. C Tau-PET (flortaucipir) scan with predominant parieto-occipital tracer uptake in a patient with PCA.