Malignant lung tumors may grow very quickly. The American Lung Association (ALA) notes that the uncontrollable growth of a tumor may block your airways, making it difficult to breathe.
What’s more, sometimes cancerous tumors may spread from one part of your body to another. This happens when a tumor sheds malignant cells, which may then be transported to other parts of your body. The cell may be carried either through lymph fluid that surrounds your lung tissue or through your bloodstream.