Lung Cancer: What and how (I)
Benign and malignant tumors are named for the spot of the tumor originates. Thus, lung cancer begins to develop in the lungs. Some malignant tumors originate elsewhere in the body and spread to the lungs. Are lung metastases. But in this case are not lung cancer itself: keep the name of their place of origin. For example, breast cancer may give lung metastases, but still called breast cancer.
Over 80% of lung cancer cases arising from the use of snuff. But although the snuff is the leading cause and responsible for most cases, anyone can develop lung cancer.
Lung cancer is always treatable, regardless of size, location and extent of spread. It is believed that lung cancer develops over many years, now is time to grow when the symptoms begin to appear that will lead to a diagnosis.
The lungs contain many different cell types. Most of the lung are epithelial cells, a variety of cells that line the airways. The lungs also contain other types of cells such as nerve cells, producing hormones and structural or supporting cells.
Lung cancer begins when cells in the lung to lose control and begin to grow abnormally faster, accumulating and forming a mass or tumor (also be called lump, lesion or nodule). A cancerous tumor is, therefore, accumulation of large numbers of cancer cells, and appears as a nodule tissue anywhere in the lung.
Nearly all lung cancers are carcinomas, ie tumors that arise in lining tissues, in lung epithelial cells. In the case of lung cancer, tumors usually begin in the lining of the bronchi, but can also arise in other areas of the respiratory system such as the trachea, bronchioles, or alveoli. Over 95% of lung cancers belong to the group called bronchogenic carcinoma.
Posted in 
Tags: