Breast Cancer trend in Taiwan

Submit Manuscript | http://medcraveonline.com countries. According to the statistics (Figure 2), the rate of early stage (stages 0-2) breast cancer cases diagnosed by screening was 86%, whereas the rate of those not diagnosed by screening was 56%. Regular screening assists in recognizing early stage of breast cancer, and early treatment increases the remission rate, therefore, the five-year survival rate of screened patients reached higher than 90%, whereas the five-year survival rate of unscreened patients suffered from breast cancer diagnosed at late stage (stage 4) was only 27.8%. Mammography is the process of using low-energy X-rays (about 0.7 mSv) to examine human breast for screening calcification and stage 0 (carcinoma in situ) of breast cancer [3]. A randomized trial with large scale mammography screening of breast cancer in 1977 has adopted the spilt screen design with inviting one group for periodical mammography while the other group was not invited. When the trial was ended in 1985, the controlled group was provided with one screening to balance the prevalence screening cases of screening group and lessen bias. After following up for several years, it showed a significant difference in mortality rate. The mortality rate of breast cancer in women with periodical screening declines up to 30 percent [4]. Nowadays, according to the medical evidence, the western countries promote large scale screening services for women as well as subsidies of breast x-ray once every two years for patients aged 45-69 or patients aged 40-44 with family history of breast cancer (which means anyone of the patient’s grandmothers, mother, daughter(s) or sister(s) has ever suffered from breast cancer) to protect the health of women’s breasts.