Lung cancer is the #1 cause of deaths from cancer globally.
The abnormal cells growing rampantly in the lungs form tumors as they invade the tissue, involving any segment of the respiratory system. It spreads to lymph nodes and other parts of the body, most noticeably the heart and brain.
There are two types of abnormal cells for lung cancer:
- SCLC (small cell lung cancers) - grow more rapidly and more likely to spread
- NSCLC (non-small cell lung cancers)- the more common lung cancer type
Most lung cancer cases are linked to smoking (80%) due to chronic cell damage by carcinogens within the tobacco.
However, Increased risks are due to:
- radioactive dust
- secondhand smoke
- gene mutations (occur with aging)