What is Lung Cancer?
In the United States alone, lung cancer is the leading cause of mortality for both men and women. The increase in the incidence and deaths in people diagnosed with lung cancer have corresponded with the increase in cigarette smoking. Lung cancer can be categorized into small-cell carcinoma and non-small-cell carcinoma.
Subsequent to exposure to a particular carcinogen, the proto-oncogenes become oncogenes, and the tumor suppressors are then deactivated. Cigarette smoking is by far the most universally related contributor of primary lung cancer. Air pollution, as well as passive or second hand smoke may contribute to the development of lung cancer. It is found out in a research that side stream smoke or passive smoking is more hazardous than direct smoke inhalation. Chronic exposure to these pollutants and carcinogens causes snowballing changes to the DNA in the tissue lining. The more tissues become damaged, the higher the risk of lung cancer is.
Other contributing factor is viral infection. Certain viruses interrupt in the cell cycle and impede apoptosis which then permit irrepressible cell division.
The signs and symptoms of lung cancer include cough, hemoptysis, shortness of breath, chest pain, pain radiating to arm and shoulder, fatigue, unexplained weight loss, clubbed fingers, dysphagia, hoarseness due to paralysis of the vocal cords and lymph node enlargement.
The preferred treatment for localized non-carcinomas is surgical removal this is because in this type of cancer, the malignant cells are still confined on one area and have not yet spread. In addition to surgery, radiotherapy can also be used. If the disease becomes infiltrative and extensive, the best treatment option is chemotherapy.
Pictures of Lung Cancer
Photos, Images and Pictures of Lung Cancer…