[Mammography screening--advantages and disadvantages].

Mammography screening involves advantages as well as disadvantages. Intensive research in this area is being carried out both internationally and in Denmark. As mammography screening becomes nationwide in Denmark in 2007, it is crucial to closely monitor the advantages as well as the disadvantages, their extent and the possibility of optimizing the balance between them. The effect of a screening programme on breast cancer mortality is not likely to be evident until several years after starting the programme, and it is necessary to define process indicators for close monitoring of the programme.