The lungs are the respiratory organs that are situated in the thorax of the ribcage and consist of a thin moist membrane that increases its surface area. Therefore, the exchange of oxygen as well as carbon dioxide takes place on one side with air on the other side of the membrane. Lungs are ventilated by respiratory movements using sacs attached to the bronchus via various bronchioles. Lung cancer is an illness that affects the lungs by uncontrolled cell growth that may spread beyond the lung in metastasis form to other body areas. The three main sub-types include: squamous cell lung carcinoma, adenocarcinoma, and large-cell lung carcinoma, while small-cell lung carcinoma is less common. These cancers themselves metastasize to the adrenal glands, liver, brain, and bones.
Globally, this cancer is the most common type of death due to cancer in the United States and has caused 1.4 million deaths as of 2004. It is the third most commonly occurring cancer as the highest cancer related mortality in the United States with breast and prostate occurring more frequently. Less that 15% of these cancers are caught in the early stages, which make fighting against the disease more difficult.
Symptoms of lung cancer include:
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