Stage 4 Lung Cancer treatment depends on where the disease is . for example if the patient is having the disease more infernal, then they presents with cough, breathlessness and if the patient has lung cancer spread to the bone they may presents with bone pain. If they have lung cancer spread to the liver then they may have abdominal pain, they may also have filling of the abdomen with fluid, typically the Stage 4 Lung Cancer symptoms depends on where is the cancer. Sometimes the Stage 4 Lung Ca