Cancer & Tumors Cancer & Oncology Lungs & Breathing

stage IA non-small cell lung cancer

Meaning of stage IA non-small cell lung cancer: Stage I non-small cell lung cancer is divided into stages IA and IB.

Definition of stage IA non-small cell lung cancer

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.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.