Blood Tests
Blood tests alone are not sufficient to diagnose lung cancer. However, they can detect metabolic or biochemical changes associated with cancer. Abnormally high levels of alkaline phosphatase and calcium in the blood can indicate the metastases of cancer to the bones. Similarly, abnormal levels of enzymes produced by the liver that may include alanine aminotransferase (ALT) and aspartate aminotransferase (AST) can indicate the liver damage due to spread of cancer to the liver.