Clinical expression and diagnosis of atypical cortical degenerative syndromes.

Atypical cortical degenerative syndromes of the non-Alzheimer's disease type are becoming increasingly recognized in the literature. Three cases consisting of primary progressive aphasia, posterior cortical atrophy, and frontal lobe dementia of the non-Alzheimer's type are presented to replicate and extend emerging literature. Detailed clinical description and neuropsychological data, coupled with confirmatory neurofunctional imaging, are presented to provide empirical support that specific inclusion and exclusion criteria can be applied to clinically diagnosis atypical degenerative cortical dementias.