FIGURE 6. ¹⁸F-FDG PET images of early frontotemporal dementia. This patient (66-y-old man) was diagnosed both clinically and by PET as having frontotemporal disease. The patient’s MMSE score at the time of PET was 27 of a possible 30 points. Arrows indicate bilateral hypometabolism of the frontal cortex (far left), at a time that the remainder of the cerebral activity is not appreciably affected (middle left, middle right, and far right).