The idea of the new COST Action here presented was born in the context of the recently born European Cytogeneticist Association (1997). Fundamental framework of ECA are working groups which aggregate investigators working in a specific field. Interaction among European scientists involved in molecular cytogenetics of solid tumours has stimulated scientific and organization plans that are not likely feasible within the broad association of ECA. Operative focus on the specific sector of solid tumours needs a novel framework that exploits the great resources of expertise and competence represented in a remarkable number of European universities and industrial labs.

The first ECA meeting (Athens, 1997) has played a historical role, as indicated, in coming to the idea of this proposal. The planned action is however fully independent of the organization of ECA.