stage I

Definition of stage IA non-small cell lung cancer
National Cancer Institute

stage IA non-small cell lung cancer

(... 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. Cancer has not spread to the lymph nodes.

Source: NCI Dictionary of Cancer Terms