Gray et al., in 1966, introduced the term "periodic painful ulcers of lower extremities" as a synonym for atrophie blanche. They defined the condition as a distinct disease entity with a "spectrum of changes beginning with telangiectatic purpuric areas which undergo superficial necrosis and later heal with residual white atrophic scars." [25] Gray et al. told of exacerbation in summer in four of ten patients and they noted the similarity of the condition observed by them to what had been reported on by Feldaker et al. as livedo reticularis with summer ulcerations (see also livedo reticularis with summer ulcerations). They failed, however, to state straightforwardly that their patients essentially had the same condition as the ones studied by Feldaker. The photomicrographs included in their article show thrombi in the lumina of small vessels in the dermis, a finding typical of what today is called livedo vasculitis (see also livedo vasculitis).