Considerations on Retrospective Identification and Classification of Learning Disabilities

To the Editor Miller and colleagues,¹ focusing on atypical neurodegenerative presentations, found an increased retrospective prevalence of learning disabilities (LDs) in logopenic variant progressive primary aphasia and in posterior cortical atrophy in comparison with amnestic Alzheimer disease and reported general population rates, with language-based LD more common in logopenic variant progressive primary aphasia and mathematical and visuospatial-based LD more common in posterior cortical atrophy.