About Lung Cancer
The excerpt below is from an article series on lung cancer …
The body is made up of many types of cells. Normally these cells grow, divide, and produce more cells as needed to keep the body healthy and functioning properly.
Normal cells constantly reproduce themselves throughout a person’s life, but they do so in a systematic and controlled manner. Usually normal cell growth occurs, so worn out tissues can be replaced and wounds repaired.
Sometimes, however, this process goes off track and cells start to grow out of control. They form a mass, and this mass is called a tumour. Tumours can be either benign or malignant.
Cancer is an illness in which abnormal cells in organs and tissues in the body grow out of control. These cells grow and increase in prolific numbers over a period of time. Cancer cells invade and destroy the tissue surrounding them. They split away from a malignant tumour and enter the bloodstream or lymphatic system. (These are the tissues and organs that produce, store, and carry white blood cells which fight infection and other diseases).
This process is called metastasis and it is how cancer spreads from the original (primary) tumour to form new (secondary) tumours in other parts of the body.
Read the rest of this article series here: Lung Cancer
