The staging of a lung cancer is done by doctors performing a variety of tests within the body and on the tumor itself. The tests include blood chemistry, x-rays, CT scans, MRI scans and bone scans. If the blood chemistry tests are abnormal then there is a high possibility that the cancer has spread to the bone and/or the liver. Radiological procedures help to determine the size of the cancerous tumor and if it has spread to any other organs.
There are four stages of lung cancer as defined by the severity of the cancer. The stages are I, II, III and IV. Stage I is the lowest stage of lung cancer. It means that the cancer is only confined to the lung or lungs and has not spread to any other tissues or organs within the body. It also means that the cancer has not spread to the bones or nerves of the body.
Stage I: This stage of tumor is localized to the lung. If a patient is diagnosed with Stage I lung cancer, their prognosis will be better than a patient with Stage IV lung cancer because it is easier to treat an early-stage lung cancer with chemotherapy or radiation therapy.
Stages II & III: Stage II and Stage III lung cancers are confined to the chest. Tumors associated with Stage III lung cancer are larger and more invasive than Stage II’s tumors. The smaller the tumor, the more easily it can be treated with chemo and radiation therapies.
Stage IV: Stage IV lung cancer, as with all other Stage IV cancers, is the worst stage of cancer. In Stage IV lung cancer, the tumor has spread to other parts of the body. Parts of the body in danger are the brain, the bones, the nerves, the spleen, the pancreas, the colon, the……