Lung cancer is cancer that forms in tissues of the lung, usually in the cells that line the air passages. It is the leading cause of cancer death in both men and women. There are two main types: small cell lung cancer and non-small cell lung cancer. These two types grow differently and are treated differently.
What is the simple definition of cancer?
(KAN-ser) A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems. There are several main types of cancer.
What is lung cancer and how do you get it?
Anyone can get lung cancer. Lung cancer happens when cells in the lung mutate or change. Various factors can cause this mutation (a permanent change in the DNA sequence of a gene) to happen. Most often, this change in lung cells happens when people breathe in dangerous, toxic substances.
Which definition best defines cancer?
Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, in some cases, to metastasize (spread). Cancer is not one disease. It is a group of more than 100 different and distinctive diseases.
What are 4 types of cancer?
Four main types of cancer are:
- Carcinomas. A carcinoma begins in the skin or the tissue that covers the surface of internal organs and glands. …
- Sarcomas. A sarcoma begins in the tissues that support and connect the body. …
- Leukemias. Leukemia is a cancer of the blood. …
How does lung cancer happen?
Lung cancer starts when abnormal cells grow out of control in the lung. They can invade nearby tissues and form tumours. Lung cancer can start anywhere in the lungs and affect any part of the respiratory system. The cancer cells can spread, or metastasize, to the lymph nodes and other parts of the body.
Why does lung cancer occur?
Smoking tobacco is by far the leading cause of lung cancer. About 80% of lung cancer deaths are caused by smoking, and many others are caused by exposure to secondhand smoke. Smoking is clearly the strongest risk factor for lung cancer, but it often interacts with other factors.
What are the 7 signs of lung cancer?
The most common symptoms of lung cancer are:
- A cough that does not go away or gets worse.
- Coughing up blood or rust-colored sputum (spit or phlegm)
- Chest pain that is often worse with deep breathing, coughing, or laughing.
- Loss of appetite.
- Unexplained weight loss.
- Shortness of breath.
- Feeling tired or weak.
Why is called cancer?
The word “cancer” came from the father of medicine: Hippocrates, a Greek physician. Hippocrates used the Greek words carcinos and carcinoma to describe tumors, thus calling cancer “karkinos.”1 The Greek terms actually were words that were used to describe a crab, which Hippocrates thought a tumor resembled.
What is cancer According to who?
Overview. Cancer is a large group of diseases that can start in almost any organ or tissue of the body when abnormal cells grow uncontrollably, go beyond their usual boundaries to invade adjoining parts of the body and/or spread to other organs.
What is sentence of cancer?
Examples of cancer in a Sentence
He was diagnosed with cancer. She learned that she has cancer. Eating certain foods may help reduce the risk of cancer. Advanced cancers are more difficult to treat.