When cancer invades the thyroid gland, it interferes with our body's ability to make hormones that control our heart rate, blood pressure, body temperature and weight. Although there are 4 types of thyroid cancer, the most common is papillary (PA-pih-LAYR-ee) thyroid cancer. A slow forming disease, papillary thyroid cancer typically strikes between the ages of 30 and 50, and affects women more than men. You are at greater risk of developing this disease if you have a personal or family history of goiters, have been exposed to high levels of radiation in the past, or certain genetic endocrine diseases. See your doctor if you notice a lump in your neck, feel hoarse or have trouble breathing or swallowing. This may be a sign cancer has affected your thyroid, which is located at the base of the throat near your windpipe. Early detection and treatment make this one of the least deadly cancers in the U.S.