RT Journal Article SR Electronic T1 Presenile dementia syndromes: an update on taxonomy and diagnosis JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 691 OP 700 DO 10.1136/jnnp.72.6.691 VO 72 IS 6 A1 M D Greicius A1 M D Geschwind A1 B L Miller YR 2002 UL http://jnnp.bmj.com/content/72/6/691.abstract AB The four major degenerative dementias that often begin in presenescence: are reviewed. These are Alzheimer's disease, frontotemporal dementia, dementia with Lewy bodies, and Creutzfeldt–Jakob disease. Their epidemiological, genetic, and clinical features are reviewed, and controversies in taxonomy arising from recent discoveries described. Particular attention is given to the pathological role of protein aggregation, which appears to be a factor in each disease.