Interior of the cecum and lower end of ascending colon with the ileocecal valve labeled as colic valve. Endoscopic image of cecum with arrow pointing to ileocecal valve in foreground.
Lung cancer is a malignant tumour that starts in the cells of the lung. Malignant means that it can spread, or metastasize, to other parts of the body. When cancer starts in lung cells, it is called primary lung cancer. The lung is part of the respiratory system. You use your lungs when you breathe.
Each lung has sections called lobes. Two tubes called bronchi lead from the trachea (windpipe) to the lungs.The two main types of lung cancer are non-small cell lung cancer and small cell lung cancer.The types are based on the way the cells look under a microscope. Non-small cell lung cancer is much more common than small cell lung cancer.Tobacco smoking is the most common cause of lung cancer.Lung cancer is the leading cause of death from cancer in the U.S. and the number of deaths from lung cancer in women is increasing. For most patients with lung cancer, current treatments do not cure the cancer.ach lung has sections called lobes. Two tubes called bronchi lead from the trachea (windpipe) to the lungs.The two main types of lung cancer are non-small cell lung cancer and small cell lung cancer.