According to the United States Cancer Statistics, the country reported 197,453 new cases of lung cancer in 2020, where males had higher fatality rates. Like other cancers, lung cancer is categorized by stages based on how widespread it is in the body. Generally, the higher the stage, the more severe the cancer. Late-stage lung cancer can exhibit a higher severity of symptoms but might also mean limited treatment options. Signs Late-stage lung cancer or stage 4 lung cancer is when the cancer has metastasized. Some patients get diagnosed at this stage due to its worsening symptoms. Before this, some overlook the symptoms or associate them with another condition. Persistent cough is among the most common signs of lung cancer. It can last for weeks or even months at a stretch. Some patients who experience hemoptysis should be quick to visit the doctor. Chest pain is another sign of late-stage lung cancer in patients. Patients experience sharp stabbing pains that may or may not be specific to a local area. Some patients report experiencing a dull kind of ache that persists all over their chest. Shortness of breath is present if the person has been performing activities that can tire or exert them.