Lung cancer is a growth of malignant cells in the lungs.You see, throughout your life the cells in your body continually divide and reproduce. Now, for the most part, this all takes place in an orderly manner as your cells go about doing their job of meeting the needs of your body. Lung cancer is the growth of these malignant cells in the lungs.Most often, the malignant cells are believed to form in the epithelial lining of the airways, where the oxygen is extracted from the air we breathe. This is why lung cancer is sometimes referred to as bronchogenic carcinoma (cancer arising from the bronchia). A relatively small percentage of lung cancer (10% or less) begins in the pleura, the thin tissue sac that surrounds the lungs. These cancers are called mesothelioma. The rarest form of begins in the blood vessels or other supporting tissues of the lungs.
Types of Lung Cancer
There are two main types - small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC).Less than one percent of SCLC is diagnosed in non-smokers. This means that smoking is the primary culprit behind this type of lung cancer. SCLC is aggressive and fast-moving. It rapidly metastasizes to other organs, and is often not discovered until the cancer is already widespread throughout the body.Non-small cell lung cancer accounts for approximately 80% of diagnosed lung cancer cases. Within this category, there are three main sub-categories.squamous cell cancer, adenocarcinomas, and large cell carcinomas.
A Deadly Cancer
Cancer of the lungs is one of the deadliest forms of cancer. This is primarily due to the fact that lung cancer tends to metastasize early in the process of the disease and is often not discovered until it's spread. Additionally, when it does metastasize, it tends to spread to the most vital yet vulnerable organs of the body. Finally, because the lungs are so susceptible to metastatic cancers from other sources throughout the body, it's not uncommon to find a cancer in the lungs that is not lung cancer but a metastatic cancer. These cancers tend to make their home in the peripheral tissues of the lungs rather than the primary tissues.
Types of Lung Cancer
There are two main types - small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC).Less than one percent of SCLC is diagnosed in non-smokers. This means that smoking is the primary culprit behind this type of lung cancer. SCLC is aggressive and fast-moving. It rapidly metastasizes to other organs, and is often not discovered until the cancer is already widespread throughout the body.Non-small cell lung cancer accounts for approximately 80% of diagnosed lung cancer cases. Within this category, there are three main sub-categories.squamous cell cancer, adenocarcinomas, and large cell carcinomas.
A Deadly Cancer
Cancer of the lungs is one of the deadliest forms of cancer. This is primarily due to the fact that lung cancer tends to metastasize early in the process of the disease and is often not discovered until it's spread. Additionally, when it does metastasize, it tends to spread to the most vital yet vulnerable organs of the body. Finally, because the lungs are so susceptible to metastatic cancers from other sources throughout the body, it's not uncommon to find a cancer in the lungs that is not lung cancer but a metastatic cancer. These cancers tend to make their home in the peripheral tissues of the lungs rather than the primary tissues.
source by ezinearticles.com
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