How quickly does lung cancer spread?

Unfortunately, lung cancer can spread very quickly and is considered one of the most aggressive forms of cancer. It usually spreads rapidly to other parts of the body via the bloodstream or lymphatic system, undermining the effectiveness of traditional treatments like surgery and radiation therapy.

Doctors classify two types of lung cancer-- non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC)-- based on how quickly they typically spread. NSCLC is generally slower-growing than SCLC; however, it can still metastasize in a matter of weeks or months depending on its stage, size, location within your lungs and type. In comparison with SCLC, which tends to be more advanced by time it's diagnosed due to its rapid growth rate - some cases have been known to spread in as little as 4–8 weeks after diagnosis.

The best way to reduce your risk for getting advanced-stage lung cancers is by early detection through screenings such as low dose CT scans that allow doctors to detect early changes in cells before they turn into tumors or metastasis has started. Additionally, stopping tobacco use will help lower your risk significantly since smoking cigarettes are linked with more than 80% of all cases diagnosed each year.