Prevalence of women with breast implants in Sweden: a study based on the population-based mammography screening programme.

Background: Knowledge about the prevalence of women with breast implants is paramount in calculations of risks and in estimations of effects on screening and breast cancer treatment. Most of the estimations of prevalence made to date are rough and often based on sales data. The main aim of this study was to  calculate the prevalence of breast implants in Swedish women.