[Breast cancer screening in Switzerland : organised, opportunistic, or opting out ?]

In Switzerland, breast cancer screening takes the form of organised programmes or opportunistic screening. Current programmes cover fifteen out of twenty-six cantons, offer a standardised framework and strict quality control with periodic evaluations. Opportunistic screening broadens access but without systematic quality control, data or equity of access. In both cases, screening leads to earlier detection and reduced mortality of breast cancer but exposes patients to the risks of false positives and overdiagnosis. Abstaining from screening increases the risk of late diagnosis and heavy treatment. An interprofessional approach involving primary care physicians, specialists and public health actors is essential to inform women and offer them high-quality screening that is better integrated into their care pathway.