Cancer lung?

An uncontrolled cell growth in the cell tissues of lungs causes lung cancer. This growth may lead to metastasis, which is the invasion of adjacent tissue and infiltration beyond the lungs. The vast majority of primary lung cancers are carcinomas of the lung, derived from epithelial cells. Lung cancer, the most common cause of cancer-related death in men and women, is responsible for 1.3 million deaths worldwide annually, as of 2004.

Hi Deeksha,
Cancer of the lung is leading among the other cancers. It is also known as bronchogenic carcinomas. The lung cancers are malignant. Lung cancer tend to spread to the other organs of the body particularly brain, bone, adrenal glands and liver. It can be caused due to family history, smoking, exposure to the radon gases or asbestosis etc.

Check out the link to know more about lung cancer:
http://www.lifemojo.com/forums/general-health/lungs-cancers-97489274