What is Lung Cancer ?
Lung Cancer is a condition that causes uncontrollable division of cells in the lungs. This results in tumor growth, which decreases a person’s breathing capacity. It starts in the lungs and can spread through the blood or lymph nodes to other organs of the body. The process through which cancer cells travel and affect other organs is called metastasis. Lung cancers are typically classified into two major groups, called Small Cell Lung Cancer (SCLC) and Non Small Cell Lung Cancer (NSCLC), the latter of which is more common. These two types of Lung Cancer have different symptoms and their mode of treatment varies as well.
As you breathe in, air flows through your mouth or nose, and the trachea through your lungs. The trachea divides into bronchial tubes that enter the lungs and divide into smaller bronchi. These split into smaller branches, which are called bronchioles. There are tiny air sacs at the end of the bronchioles known as alveoli. The alveoli draws oxygen from the inhaled air and releases carbon dioxide, which is exhaled from the body.
Typically, symptoms of Lung Cancer originate in the cells lining the bronchi and lung sections, such as the bronchioles or alveoli.
A thin layer of padding called pleura covers the lungs. The pleura supports the lungs and allows them to move back and forth against the chest wall as they expand and contract. A small, dome-shaped muscle, called the diaphragm, separates the chest from the abdomen under the lungs. The diaphragm goes up and down as you breathe, driving air into and out of the lungs.