Cancer in breast tissue is known as breast cancer. In the United States, Breast cancer is found to be the most common cancer diagnosed in women after skin cancer. Though the possibilities of breast cancer exist in both male and female, it is a disease found more commonly in females. In the past few years due to the development of molecular biology, a lot of research has been done in the areas of diagnosis and treatment of breast cancer. But breast cancer continues to be a major problem in the female population. Here we have provided a brief introduction to breast cancer, its different types, signs and symptoms, stages, its diagnosis and treatment as well as genetic aspect of breast cancer.