In this topic we are talking about one of
the most ugly diseases in the world .
Lung cancer, also known as lung carcinoma,
[1] is a malignant lung tumor characterized by uncontrolled
cell growth in tissues of the lung.[2] If left untreated, this growth
can spread beyond the lung by the process of metastasis into nearby
tissue or other parts of the body.[3] Most cancers that start in the lung, known as primary lung cancers, are carcinomas.[4] The two main types
are small-cell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC).
[5] The most common symptoms are coughing (including coughing up blood),
weight loss, shortness of breath, and chest pains.[6]
The vast majority (85%) of cases of lung cancer are due to long-term tobacco smoking.[1] About 10–15% of cases occur in people who have never smoked.[7] These cases are often caused by a combination of genetic factors and exposure to radon gas, asbestos, second-hand smoke, or other forms of air pollution.[8][9][10][11] Lung cancer may be seen on chest radiographs and computed tomography (CT) scans.[1] The diagnosis is confirmed by biopsy which is usually performed by bronchoscopy or CT-guidance.[12][13]
Prevention is by avoiding risk factors including smoking and air pollution.[14] Treatment and long-term outcomes depend on the type of cancer, the stage (degree of spread), and the person's overall health.[1] Most cases are not curable.[5] Common treatments include surgery, chemotherapy, and radiotherapy.[1] NSCLC is sometimes treated with surgery, whereas SCLC usually responds better to chemotherapy and radiotherapy.[15]
Worldwide in 2012, lung cancer occurred in 1.8 million people and resulted in 1.6 million deaths.[4] This makes it the most common cause of cancer-related death in men and second most common in women after breast cancer.[16] The most common age at diagnosis is 70 years. Overall, 17.4% of people in the United States diagnosed with lung cancer survive five years after the diagnosis,[17] while outcomes on average are worse in the developing world.[18]Lung cancer, also known as lung carcinoma,[1] is a malignant lung tumor characterized by uncontrolled cell growth in tissues of the lung.[2] If left untreated, this growth can spread beyond the lung by the process of metastasis into nearby tissue or other parts of the body.[3] Most cancers that start in the lung, known as primary lung cancers, are carcinomas.[4] The two main types are small-cell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC).[5] The most common symptoms are coughing (including coughing up blood), weight loss, shortness of breath, and chest pains.[6]
The vast majority (85%) of cases of lung cancer are due to long-term tobacco smoking.[1] About 10–15% of cases occur in people who have never smoked.[7] These cases are often caused by a combination of genetic factors and exposure to radon gas, asbestos, second-hand smoke, or other forms of air pollution.[8][9][10][11] Lung cancer may be seen on chest radiographs and computed tomography (CT) scans.[1] The diagnosis is confirmed by biopsy which is usually performed by bronchoscopy or CT-guidance.[12][13]
Prevention is by avoiding risk factors including smoking and air pollution.[14] Treatment and long-term outcomes depend on the type of cancer, the stage (degree of spread), and the person's overall health.[1] Most cases are not curable.[5] Common treatments include surgery, chemotherapy, and radiotherapy.[1] NSCLC is sometimes treated with surgery, whereas SCLC usually responds better to chemotherapy and radiotherapy.[15]
Worldwide in 2012, lung cancer occurred in 1.8 million people and resulted in 1.6 million deaths.[4] This makes it the most common cause of cancer-related death in men and second most common in women after breast cancer.[16] The most common age at diagnosis is 70 years. Overall, 17.4% of people in the United States diagnosed with lung cancer survive five years after the diagnosis,[17] while outcomes on average are worse in the developing world.[18]
