what is lung cancer?

Lung cancer, like all cancers, results from abnormalities in the body's basic unit of life, cells. Normally, the body has a system of checks and balances on cell growth so that cells divide to produce new cells only when new cells are needed. Disruption of the system of checks and balances on cell growth results in the uncontrolled division and proliferation of cells that eventually form masses known as tumors.

Tumors can be benign or malignant, when we speak of "cancer", we refer to these tumors are malignant. Benign tumors can usually be removed and not spread to other parts of the body. Malignant tumors, on the other hand, grow aggressively and attack other tissues in the body, allowing the entry of tumor cells into the bloodstream or lymphatic system, then to other sites in the body. deployment process called metastasis, the growth areas of the tumor on this site is called metastasis. Since lung cancer tends to spread or metastasize very early form, it is very life threatening cancer and one of the most difficult cancers to treat. Although lung cancer can spread to all organs of the body, certain organs - particularly the adrenal gland, liver, brain and bones - are the most common site of metastatic lung cancer.

lungs is also a very common site for metastases of tumors in other parts of the body. Tumor metastasis is made of the same type as the tumor cells (primary) origin. For example, if prostate cancer spreads through the bloodstream to the lungs, it is the metastasis of prostate cancer in lung cancer and lung cancer.

The image of lung cancer

Pictures of lung cancer

The main function of the lungs is to exchange gases between the air we breathe and the blood. Through the lungs, carbon dioxide removed from the blood and oxygen from inhaled air enters the bloodstream. right lung has three lobes, while the left lung is divided into two lobes and a small structure called a language which is equivalent to the middle lobe on the right. main roads in the lungs are the bronchi, which arise from the trachea. branches of the bronchi in the airways become smaller called bronchioles that end in tiny sacs called alveoli where gas exchange occurs. The lungs and the chest wall is covered with a thin layer of tissue called the pleura.

Lung cancer may occur in the lung, but 90% to 95% of lung cancer is estimated from epithelial cells, cells that line the airways, both large and small (bronchi and bronchioles), for this reason, lung Lung cancer is sometimes called bronchogenic carcinoma or lung cancer. (Carcinoma is another term for cancer.) Cancer can also arise from the pleura (mesothelioma) or rarely by supporting tissues in the lungs, for example, blood vessels.