Every so often a gathering of minds and experience occurs that results in an all encompassing overview in depth of such a vast subject as Cerebro-Vascular Malformations, as occurred in Verona in June 1992 and which warrants publication. Professors Da Pian and Pasqualin deserve high compliment and it is a measure of the respect in which they are held that virtually all those most knowledgeable around the world attended, presented their work and thoughts and contributed to intense discussion. Ljunggren's opening historical survey set the stage and must be the most comprehensive yet published....