Questions About Cancer? 1-800-4-CANCER
  • Print
  • Facebook
  • Twitter
  • Google+
  • Pinterest

NCI Dictionary of Cancer Terms

stage IA non-small cell lung cancer  listen  (... sel lung KAN-ser)

  Stage I non-small cell lung cancer is divided into stages IA and IB. In stage IA, the tumor is in the lung only and is 3 centimeters or smaller.

Two-panel drawing of stage I non-small cell lung cancer. First panel shows stage IA with cancer (3 cm or less) in the right lung; also shown are the right main bronchus, trachea, lymph nodes, bronchioles, and diaphragm. Second panel shows stage IB with cancer (more than 3 cm but not more than 5 cm) in the left lung and in the left main bronchus; the carina is also shown. Inset shows cancer that has spread from the lung into the innermost layer of the lung lining; a rib is also shown.