At present, clinical staging of lung adenocarcinoma mostly adopts TNM staging, which contains three indexes: primary tumor, lymph node metastasis, and metastasis to distant organs.
T refers to the primary tumor lesion, and the larger the tumor diameter is, the later the T stage is, which can be divided into T1 to T4.
N refers to lymph node metastasis, usually the more the number of metastatic lymph nodes and the wider the range, the later the N stage, and the N stage can be divided into N0 to N3.
M refers to the situation of distant organ metastasis, M0 means that no distant organ metastasis has been found, and M1 indicates that distant organ metastasis has occurred. The detection of distant organs is designated as stage IV, i.e., advanced tumor stage.
Different combinations of T, N and M can result in different TNM stages, and it is usually considered that stages I and II are relatively early, while stage IV is the advanced stage of the tumor. The treatment principles of lung adenocarcinoma with different stages are different.
Patients suffering from lung adenocarcinoma are advised to go to the hospital as early as possible and ask professional doctors to fully evaluate the condition and judge the clinical stage to guide the next step of treatment.