Breast cancer continues to be the most common type of cancer in the United States, with over 300,000 cases of breast cancer diagnosed yearly. About one in eight women will be diagnosed with the disease. While a breast cancer diagnosis is a frightening situation, treatment is very effective. The American Cancer Society reports the estimated five-year survival rate for women with stage 0 or stage 1 breast cancer is almost 100 percent. For women with stage II breast cancer, the five-year survival rate is about 92 percent, and for women with stage III breast cancer have a five-year survival rate of about 72 percent.