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Glossary Term

stage I malignant mesothelioma     (...muh-LIG-nunt MEH-zoh-THEE-lee-OH-muh)

Stage I is divided into stages IA and IB. In stage IA, cancer is found in one side of the chest in the lining of the chest wall and may also be found in the lining of the chest cavity between the lungs and/or the lining that covers the diaphragm. Cancer has not spread to the lining that covers the lung. In stage IB, cancer is found in one side of the chest in the lining of the chest wall and the lining that covers the lung. Cancer may also be found in the lining of the chest cavity between the lungs and/or the lining that covers the diaphragm.