A progressive extrapyramidal syndrome and dementia occurred in three m
embers of one family. The age of onset was in the seventh decade and t
he affected individuals showed many of the clinical features of progre
ssive supranuclear palsy (PSP). Necropsy of one individual revealed th
e neuropathological features of PSP. We propose that this family has a
familial form of PSP and review the evidence in the literature that a
familial form exists.