Stage 4 lung cancer is the most advanced form of the disease. According to the American Cancer Society, stage 4 means the lung cancer has spread, or what doctors call “metastasized,” beyond the lung. Though cancer can travel anywhere in the body, lung cancer is most likely to metastasize to the brain, bones, liver, and adrenal glands, notes Moffitt Cancer Center in Florida.
According to the American Society of Clinical Oncology (ASCO), stage 4 lung cancer is divided into two subcategories:
- Stage 4A The cancer has spread within the chest or it has spread to one area outside the chest, or both.
- Stage 4B The cancer has spread outside the chest to more than one area in one organ or to more than one organ in the body.
Read more here: https://www.everydayhealth.com/lung-cancer/living-with-stage-4-lung-cancer-survival-rates-treatments-emotional-support/
