Posterior Cortical Atrophy (PCA) Case 1Case 2Case 3 A 65-year-old patient presented with memory impairment, visual hallucinations and apraxia. MRI showed relatively mild hippocampal atrophy on the right but severe symmetrical atrophy of the parietal and occipital lobes. CSF biomarkers were compatible with Alzheimer's disease. A 60-year-old patient presented with logopenic aphasia and memory impairment. MRI showed marked widening of parietal and, to a lesser extent, occipital sulci. Hippocampal volume loss was less pronounced (MTAS 2). CSF biomarkers were consistent with Alzheimer's disease.