mediastinum(mee-dee-a-STYE-num) The area between the lungs. The organs in this area include the heart and its large blood vessels, the trachea, the esophagus, the…
mesothelioma(meh-zuh-thee-lee-OH-muh) A benign (noncancerous) or malignant (cancerous) tumor affecting the lining of the chest or abdomen.
metastasis(meh-TAS-tuh-sis) The spread of cancer from one part of the body to another. A tumor formed by cells that have spread is called a "metastatic tumor" or a…
MRIA procedure in which radio waves and a powerful magnet linked to a computer are used to create detailed pictures of areas inside the body.