The original term of diffuse Lewy bodies disease (Yoshimura et al., 1983) was followed by Lewy body dementia (Gibb et al., 1987), and more recently by the Lewy body variant of Alzheimer's disease (Hansen et al., 1990) and senile dementia of Lewy body type (Perry et al., 1990), the last two titles restricting the disorder to those with significant Alzheimer pathology or those of older age, respectively.