Hormone-sensitive breast cancer is the most common type of breast cancer. A hormone receptor test can be performed to help determine if cancer cells are sensitive to hormones, and if hormones in the body are helping cancer cells to grow. It can also be used to treat glands by blocking them from producing hormones—this may include removing a hormone-producing gland. The type of treatment used is based on many individual factors such as the size of the tumor and the patient’s age. Oncologist Dr. Merry Tetef discusses the causes, symptoms and treatments for hormone-sensitive breast cancers, including hormone blocking medication.