We reviewed the UCLA Neurobehavior Program’s subsequent clinical experience with Posterior Cortical Atrophy (PCA), and its potential for clarifying this relatively rare neurological syndrome.

D. Frank Benson and colleagues first described the clinical and neuropathological features of PCA from patients visited in the UCLA Neurobehavior program. 

Using the original criteria derived from the UCLA Neurobehavior clinic, 65 patients with neuroimaging-supported PCA were diagnosed between 1995 and 2020.

On presentation, most of the patients had visual localization complaints and related visuospatial symptoms, but nearly half had memory complaints followed by symptoms of depression. Neurobehavioral testing showed predominant difficulty with visuospatial constructions, Gerstmann’s syndrome, and Balint’s syndrome, but also impaired memory and naming. On retrospective application of the current Consensus Criteria for PCA, 59 (91%) met PCA criteria with a modification allowing for "significantly greater visuospatial over memory and naming deficits". There were 37 deaths (56.9%) with the median overall survival of 10.3 years (95% CI: 9.6–13.6 years), consistent with a slow neurodegenerative disorder in most patients.

These findings recommend modifying the PCA criteria for "relatively spared" memory, language, and behavior to include secondary memory and naming difficulty and depression, with increased emphasis on the presence of Gerstmann’s and Balint’s syndromes.