Small cell lung cancer is often subject to complications. Even after treatment, the tumor can obstruct the airways and increases the risk of respiratory infections like bronchitis or pneumonia.
In addition, the cancer can spread into other parts of the body to form metastases. Most often, the metastases are formed in the bone, brain or liver. Once in these organs, the tumor can cause bone disease, neurological problems, liver disease, and more serious health problem including death.