Understanding Lung Cancer

Lung cancer is a term used to describe a growth of abnormal cells inside the lung.

These cells divide and grow at a much quicker rate than normal cells. The cancerous cells stick together to form a cluster and this abnormal cluster of cells is called a tumour.

If the cancer cells first started growing in the lungs, the tumour is called a primary lung tumour. However, if the lung cancer cells break off and travel through the blood vessels they may latch on to and start to grow in other parts of the body e.g. the bones.

This new cancer growth is called a metastasis or secondary tumour.