Abstract: Objective The aim of this study was to analyze the screening effect of breast cancer in Shenyang,Liaoning province.Methods Cluster sampling method was used to collect the screening data of 40~74 years old women who participated in breast cancer screening in Shenyang area of Liaoning from November 2016 to March 2019.The women who met the requirements were assessed with the cancer prevention risk assessment questionnaire,and the high-risk groups were evaluated for further clinical examination.Results A total of 57664 women participated in the high-risk assessment of breast cancer.Amongst of them,18885 women as the high-risk for breast cancer were assessed,and 5664 women participated in the clinical examination of breast cancer.The positive(BI-RADS 4-5)detection rate was 6.59% in the age group of 50~59 years(χ²=10.34,P=0.006).The positive rate of heterogeneously dense and extremely dense breast type was higher than that of fat type and fibroglandular type(χ²=22.05,P＜0.001).The positive detection rate of mammography in all age groups was higher than that of ultrasound in parenchyma type except for fat type.Conclusion Women aged 50~59 years old are the key population of breast cancer prevention and control,and the detection advantage of ultrasound in the positive cases of dense breast was not obvious.

Key words: Breast cancer, Screening, Urban