How long does it take to develop lung cancer?

Lung cancer is a common malignant tumor in the respiratory system. It may take a long time to develop from early to late, such as a few years or even more than ten years. Of course, some lung cancers are more malignant, such as small cell lung cancer. From early to late, if effective anti-tumor treatment is not done, it may take a short time, such as 1-2 years. Lung cancer can be divided into adenocarcinoma, squamous cell carcinoma and adenosquamous carcinoma according to their pathological characteristics. In addition, according to their cell morphology and histological types, they can be divided into two categories: small cell lung cancer and non-small cell lung cancer.