Introduction of Lung Cancer

Lung cancer occurs when a malignant tumors grows on the bronchi where placed inside the lung and it is metastasizing as it have ability to spread to others part of the body. The most commonly spreads to the brain, bones, adrenal glands and liver, via any of three mechanisms that is direct extension, the blood vessels, or the lymph system. Direct extension occurs when a tumor grows rapidly in size such that it begins to touch an adjacent organ or structure, and penetrate itself into it. Tumor cells are also able to get into the blood and lymph circulatory systems and travel, one by one, to distant structures. According to the Malaysian Cancers Statistics in 2006, the statistics shown that there were 2,048 2006 cases of lung cancer registered with NCR, comprising of 1,445 of males and 603 of females and lung cancer is the third common cancer among populations in Peninsular Malaysia. Moreover, the Chinese were found to have higher incidence rate compared to Malay and Indians.

There are several types of lung cancer that can be identified by the size and appearance of the cancerous cells under a microscope and each kind of lung cancer arises in a different manner and behaves differently. The lung cancer can be categorized into two types which is small cell lung cancer and non-small cell lung cancer. The small cell lung cancer stands 20% of the lung cancer diseases and mostly related to the smokers that have smoking habits. The growth of cancerous cells in this type of cancer is more rapid and no symptoms in early stage. This often leads to the patients found that they have lung cancer after they reached critical stage. Therefore, in order to cure the disease, the combined of chemotherapy and radiation method are used to approached it.

Another form of lung cancer which is non-small lung cancer is the most common type of lung cancer in most of the patients. The non-small cell cancers differentiate more into three sub-types, which are squamous cell, adenocarcinoma and large cell lung cancer. The squamous cell of the non-small cell lung cancer which is begins in large section of the bronchi and it is a slowest progress type compare to others. This type of cancer disease often linked to history of smoking, while the adenocarcinoma occurs in the outermost tissue of the lung or inner of cell that lined to alveoli. The younger generation will have a higher chance and mostly girl that have no smoking habits. This probably they breathe in the chemical substance in gas formed from cigarette of smokers. The large cell lung cancers form as clusters of large undifferentiated cells, like the ademocarcinomas, they tend to occur at the periphery of the lung and growing and spreading more aggressively than squamous cell forms of lung cancer.

Different types of lung cancer cell.

Sticky, brown tar coats the lungs of tobacco smokers. Along with thousands of other damaging chemicals, tar can lead to lung cancer and acute respiration diseases.