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Methods of early detection: would clinical breastexamination and breast ultrasonography be a good alternative to mammography?
Breast cancer is one of the leading causes of cancer deaths among women[1].In the past 40 years,breast cancer incidence has doubled or even tripled in developed countries such as South Korea and Japan; whereas it is about 20% to 30% in China and India in the past decade[2-4].An increasing incidence rate of 3% each year was observed in mainland China[5].