Abstract
This issue contains a number of articles on neurodegenerative diseases, most of them genotypically analyzed with next-generation sequencing. Readers will find articles identifying potential mutations in new genes, articles examining different phenotypes associated with variation in the same gene, and a report showing an unusual phenotype associated with a known mutation in the PRNP gene. Finally, the imaging phenotypes of mutations in 2 different frontotemporal lobar dysfunction (FTLD) genes are compared.