About one in eight American women will be diagnosed with invasive breast cancer in her lifetime. Other than skin cancer, breast cancer is the most commonly diagnosed cancer in women.\nDespite its prevalence, deaths from breast cancer have been declining in recent decades thanks in part to advancements in early detection and treatment.\nThe Magee-Womens Breast Cancer Program at UPMC is on the cutting edge of breast cancer treatment in Pittsburgh. It is one of the busiest breast cancer treatment and research centers in the country.\nBasics of Cancer Development\n\u201cBreast cancer occurs when normal breast cells develop mutations that lead to uncontrolled cell growth,\u201d says Shannon Puhalla, MD, a medical oncologist and hematologist at UPMC Hillman Cancer Center. \u201cThese cells can invade nearby tissue and form a malignant mass called a tumor. They can also spread to lymph nodes or other parts of the body.\u201d The most common organs or tissues to which the cancer spreads, or metastasizes, are the liver, lung, and bone.\nTypes of Breast Cancer\nThere are several different types of breast cancer:\n\nDuctal carcinoma, the most common\nLobular carcinoma\nInflammatory breast cancer\nPaget\u2019s disease of the nipple\nBreast cancer associated with pregnancy\nMale breast cancer, which accounts for about 1 percent of all breast cancers\n\nResearch has deepened our knowledge of these cancers, how they grow, and how to treat them. Scientists have learned that hormones can affect cancer growth \u2014 for example, some cancers use estrogen or progesterone (or both) to grow. Some cancers have a higher amount of the protein HER2, or Human Epidermal Growth Factor Receptor 2. Understanding the hormone receptors and proteins present in each disease enables targeted treatment options that address the cancer\u2019s spread.\nBreast Cancer Risk Factors, Signs, and Prevention\nDr. Puhalla notes that many factors can increase your risk of breast cancer, including hormone replacement therapy, obesity, and age. Family history can increase your risk, but the majority of people diagnosed with breast cancer do not have a strong family history of the disease.\nThe earlier cancer is detected, the better your chances of survival, so knowing the signs is important. A breast lump is what many think of as an early symptom, but there are other signs to watch for as well:\n\nChange in how the breast feels, whether a lump or thickening\nPain\nDrainage from the nipple\nFlaking or crusting around the nipple\n\nRegular mammograms starting at age 40 are important for early detection as are developing lifestyle habits that lower your risk.\n\u201cLifestyle is important,\u201d Dr. Puhalla says. \u201cExercising and maintaining a healthy weight can decrease your risk. And hormone exposure also affects your risk.\u201d\nBreast Cancer Treatment Options\nMost women with suspected breast cancer undergo imaging scans, such as mammography, and biopsy. Your breast density can affect imaging, but having dense breasts doesn\u2019t necessarily increase your risk of developing breast cancer.\nWith better understanding of the differences in breast cancer, treatment options have improved, becoming more targeted to the specifics of your disease. For example, knowing whether the cancer has estrogen or progesterone receptors or both, as well whether the HER2 protein is present, can help doctors understand how your disease may grow and spread.\n\u201cTreatments vary from person to person,\u201d Dr. Puhalla says. \u201cSome may need radiation, some need chemotherapy, while others need hormone treatment or targeted therapy.\u201d For example, along with chemotherapy, a woman with HER2-positive breast cancer would likely receive a targeted therapy to block HER2.\nThe Magee-Womens Breast Cancer Program has decades of experience in breast cancer treatment in Pittsburgh.\n\u201cThe breast cancer research at our center has contributed immeasurably to the evolving understanding of the various types of breast cancer and how best to treat the disease with the clinical tools at hand,\u201d Dr. Puhalla says. \u201cWe have also pioneered new treatments and avenues of research to advance patient care and improve outcomes.\u201d\nIf you\u2019re seeking breast cancer treatment or screening, contact the Magee-Womens Breast Cancer Program today.