9. Breast cancer
Another one of the most common forms of cancer is breast cancer. Breast cancer is responsible for the death of thousands of women each year, and the symptoms are very similar to those of other types of cancer. However, because they are so common, they are also easily misdiagnosed by doctors as other diseases. Common signs and symptoms include sores on the breasts, swelling, lumpy, and painful breasts, pain, or stiffness in the area, and possibly bleeding.