NSCLC Staging | American Cancer Society
https://www.cancer.org/cancer/types/lung-cancer/detection-diagnosis-staging/staging-nsclc.html
WEBThe earliest stage of NSCLC is stage 0 (also called carcinoma in situ, or CIS). Other stages range from I (1) through IV (4). As a rule, the lower the number, the less the cancer has spread. A higher number, such as stage IV, means cancer has spread more. And within a stage, an earlier letter (or number) means a lower stage.
DA: 32 PA: 23 MOZ Rank: 6