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(... KAN-ser)
| | Stage I is divided into stages IA and IB. In stage IA, the tumor is in the lung only and is 3 centimeters or smaller. In stage IB, one or more of the following is true: (1) the tumor is larger than 3 centimeters; (2) cancer has spread to the main bronchus of the lung, and is at least 2 centimeters from the carina (where the trachea joins the bronchi); (3) cancer has spread to the innermost layer of the membrane that covers the lungs; and/or (4) the tumor partly blocks the bronchus or bronchioles and part of the lung has collapsed or developed pneumonitis (inflammation of the lung). |
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 grow larger in the lung, (b) spread to the main bronchus of the lung, (c) spread to the innermost layer of the pleura that covers the lungs. ','popup','width=780,height=630,scrollbars=1,resizable=1,menubar=0,location=0,status=0,toolbar=0'))