Primary lung cancers, which start in the lung, are carcinomas. Carcinomas are cancers which either begins in the skin or in tissues that cover the internal organs. Leukemia is cancer that has its origin in the blood-forming tissues such as bone marrow. It gives rise to the abnormal growth of blood cells. Myeloma is cancer that starts in the cells of the immune system of the body. Sarcoma is cancer that originates in the connective tissues of the body such as bone, cartilage, muscles, or blood vessels.
How many types of lungs cancers are there?
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Lung cancer is broadly classified into two categories Non-small cell lung carcinoma is found in larger cancer cells such as adenocarcinoma or squamous cells. It s occurrence of often associated with smoking. Small-cell lung carcinoma is found grouped with the smaller cells. It is rarely found in non-smokers.
Which of the following conditions is most commonly observed in the diagnosis of lung cancer?
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Until the cancer is well advanced, lung cancer does not show any symptoms. Around 8 to 10 percent of the patients are diagnosed with asymptomatic lung cancer when the radiograph is performed for any other reason. Nearly 18 to 20 percent of lung cancer patients are found to have localized effect (cancer remain confined to the affected lung only) when diagnosed at an initial stage. Around 25 percent of the lung cancer patients have regional metastasis (lung cancer which has spread to nearby tissues or organs). Lastly, almost 55 percent of the patients have a distant spread of lung cancer.
Quitting smoking helps a person to repair the damage which may lead to lung cancer.
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Most of the lung cancer cases are due to smoking; therefore it is one of the most preventable types of cancer death. Lung function increases within one month to three months after quitting smoking and lung regains its normal function within nine months. The risk of death from lung cancer drops to half after 10 years of quitting smoking.
Which of the following factors is the leading cause of lung cancer among non-smokers?
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Radon is a naturally occurring radioactive gas which is the leading cause of lung cancer in non-smokers. Natural decaying of uranium in rocks, soil, and water releases radon. Radon is an odorless and tasteless gas; therefore, it can get accumulated to dangerous levels inside homes and buildings. This may affect the health of a person and may lead to lung cancer.
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