Breast cancer screening: the questions answered.

Early detection of cancer has long been thought to be the first step towards eradicating the mortality associated with the disease. National screening programmes for breast cancer have been implemented in many countries. However, there is controversy regarding the efficacy and optimal methods of screening, which is regularly discussed in articles, at conferences and is apparent in conflicting guidelines. In this article, Nature Reviews Clinical Oncology asks four experts their opinions on some of the pressing questions associated with breast cancer screening.