Epidemiology of Breast Cancer

All over the world, the most common malignancy in women is breast cancer. Breast cancer is also a significantfactor of death in women. In 2020, approximately 2.3 million cases of breast cancer were newly diagnosed inwomen globally, and approximately 685,000 people died. Breast cancer incidence varies by region around theworld, but it is all increasing. According to the current morbidity and mortality trend of breast cancer, it is esti-mated that by 2030, the number of incidence and deaths of breast cancer will reach 2.64 million and 1.7 million,respectively. The age-standardized incidence rate was 66.4/100,000 in developed countries and 27.3/100,000 indeveloping countries. The incidence of breast cancer in the world is increasing rapidly, and the incidence ratehas increased by 57.8% in the past 30 years, and the rate of increase is 0.5% per year. The incidence and mortalityof breast cancer among Chinese women rankfirst in the world, and in recent years, the incidence and mortality ofbreast cancer among Chinese women have also been on the rise. Breast cancer is a disease caused by a variety offactors, such as genetics, estrogen levels, environment, and behavior and lifestyle. The purpose of this review is toexplore the global epidemiology, associated risk factors and molecular types of breast cancer to understand breastcancer prevalence, mortality, and to help with its prevention, early detection, treatment and improvement of prognosis.