Lung cancer is caused by an uncontrolled growth of abnormal cells in lung tissue. Primary lung cancer has its origin in the lung itself, whereas metastatic lung cancer originates in some other organ and spreads to the lungs. Lung cancer can also be defined as a malignant tumour on the lungs. Lung cancer is the most dangerous and lethal among all cancers affecting humans.
It is estimated that up to 3 million deaths are caused by lung cancer every year. Only ten percent of patients diagnosed with lung cancer are expected to survive beyond a period of five years. In America alone, about 163,500 patients die of lung cancer a year, making it the biggest killer among all illnesses.
There is growing trend of more women being diagnosed of lung cancer compared to men. This is because the ratio of female to male smokers is rising rapidly. More women are estimated to die of lung cancer than any other type of cancer.
It is estimated that up to 3 million deaths are caused by lung cancer every year. Only ten percent of patients diagnosed with lung cancer are expected to survive beyond a period of five years. In America alone, about 163,500 patients die of lung cancer a year, making it the biggest killer among all illnesses.
There is growing trend of more women being diagnosed of lung cancer compared to men. This is because the ratio of female to male smokers is rising rapidly. More women are estimated to die of lung cancer than any other type of cancer.