"There is only one corner of the universe you can be certain of improving,
and that’s your own self."
About 90% of lung cancers arise due to tobacco use. The risk of developing lung cancer is related to the following factors:
Other causes of lung cancer include the following:
Up to one-fourth of all people with lung cancer may have no symptoms when the cancer is diagnosed. These cancers usually are identified incidentally when a chest x-ray is performed for another reason. The majority of people, however, develop symptoms. The symptoms are due to direct effects of the primary tumor, to effects of metastatic tumors in other parts of the body, or to disturbances of hormones, blood, or other systems caused by the cancer.
Symptoms of primary lung cancers include cough, coughing up blood, chest pain, and shortness of breath.
Symptoms of metastatic lung tumors depend on the location and size. About 30%-40% of people with lung cancer have some symptoms or signs of metastatic disease.
Paraneoplastic syndromes are the remote, indirect effects of cancer not related to direct invasion of an organ by tumor cells. Often they are caused by chemicals released from the cancers. Symptoms include the following:
Treatment decisions in lung cancer depend on whether SCLC or NSCLC is present. Treatment also depends on tumor stage, particularly in NSCLC. A person's general physical condition (the ability to withstand treatment procedures) is also taken into account.
The most widely used therapies for lung cancer are surgery, chemotherapy, and radiation therapy.
Chemotherapy and radiation therapy