Chinanews, Shanghai, Apr. 3 – Currently the incidence rate of breast cancer is 18.7 per 100 thousand, and in Shanghai the rate is 61.2 per 100 thousand. Shen Dianyu from Shanghai Tumor Hospital and Jiang Zefei from Beijing No. 307 Hospital said last Sunday that one million people new breast cancer patients appear annually in the world, most of them in China.The doctors said there are more breast cancer patients in urban areas than in rural areas, most of them being aged from 45-50, 5 years higher than patients in Europe and America. Factors contribute to breast cancers, are heredity from families, too much absorption of fat and estrogen, etc. They stressed that the fast pace of industrialization and urbanization is also attributable to the high incidence of breast cancer in China.