McKhann et al1 present guidelines for the diagnosis of frontotemporal dementia. This is most welcome because in recent years, new data have been gathered on this condition. We find, however, that development in this field has led to terminological confusion. The same terms are used in different senses, sometimes without due explanation. Our letter draws attention to 3 terms that have become ambiguous: Pick disease, frontotemporal dementia, and frontotemporal lobar degeneration.
Wahlund L, Andersen C, Östberg P. Standardizing Frontotemporal Dementia: The Problem of Polysemy. Arch Neurol. 2002;59(7):1203–1204. doi: