Types+of+Cancer

5 Types of Cancer

= =  · Leukemia **Definition of leukemia **: Cancer that starts in blood-forming tissue such as the bone marrow and causes large numbers of blood cells to be produced and enter the bloodstream · Brain Tumor **Definition of brain tumor **: The growth of abnormal cells in the tissues of the brain. Brain tumors can be benign (not cancer) or malignant (cancer). · Melanoma **Definition of melanoma **: A form of cancer that begins in melanocytes (cells that make the pigment melanin). It may begin in a mole (skin melanoma), but can also begin in other pigmented tissues, such as in the eye or in the intestines . · Thyroid **Definition of thyroid cancer **: Cancer that forms in the thyroid gland (an organ at the base of the throat that makes hormones that help control heart rate, blood pressure, body temperature, and weight). Four main types of thyroid cancer are papillary, follicular, medullary, and anaplastic thyroid cancer. The four types are based on how the cancer cells look under a microscope. · Lung **Definition of lung cancer **: Cancer that forms in tissues of the lung, usually in the cells lining air passages. The two main types are small cell lung cancer and non-small cell lung cancer. These types are diagnosed based on how the cells look under a microscope.