REVIEW ON BREAST CANCER
Breast cancer is the most common cancer of women, comprising 25% of all female cancers around the globe, with an estimated 1.15 million cases diagnosed in 2005. Of the 421,000 breast cancer deaths around the world, 223,000 (56%) occurred in low- and middle-income countries (LMCs). However, in most low- and middle-income countries (LMCs), incidence rates are increasing at a more rapid rate than in areas where incidence rates are already high. Breast cancer incidence and prevalence in western part of the world in 1992 was 25% in 1992 and 0.5% respectively. Distribution of breast cancer incidence in the 2000s changed in different regions of world due to geographic, economic, social, cultural factors. Breast cancer incidence in western part of world 56% is more than two times in eastern part of world 24% due to “Westernizing life” (early menarche, late menopause, first birth >30 years, less breast feeding, etc.), and other related factor.