This volume is the proceedings of the 11th International Conference on Advances in Prostaglandin and Leukotriene Research: Basic Science and New Clinical Applications, held in Florence, Italy, on June 4-8, 2000, which continues the tradition of covering both basic and clinical aspects of prostaglandin and leukotriene research. At this meeting particular emphasis was given to the potential application of the novel COX-2 inhibitors, the genetics of asthma relating to the production of leukotrienes, and novel cellular networks for the production of leukotrienes and lipoxins. Traditionally, as has been done in past meetings of this series, a considerable amount of new material was presented and discussed this year, with particular attention given to the newest clinical data.