Unprecedented efficacy of latest HER2-targeting agents can extend life but at significant cost
October 20, 2014
Breast cancer is the second most common cancer in the world, and the most common cancer in women. In 2013, approximately 261,000 women were diagnosed with this disease in the United States alone.1 When diagnosed in the earliest stages, such as ductal carcinoma in situ and stage 1, the 5-year survival rate is almost 100%. If diagnosed later, or if the disease progresses to advanced breast cancer, survival rapidly decreases. Human epidermal growth factor receptor 2 (HER2)-positive breast cancer represents about 20% of cases, and before the introduction of HER2-targeting therapies, had the worst prognosis of all breast cancer subtypes.