Lung cancer is the most uncontrolled growth of abnormal cells in the lung. Normal lung tissue is made up of cells that are programmed by nature to create lungs of a certain shape and function. Sometimes the instructions to a cell go haywire and that cell and its offspring reproduce wildly, without regard for the shape and function of a lung. That wild reproduction can form tumors that clog up the lung and make it …showed first 75 words of 922 total…

…showed last 75 words of 922 total…aimed at the cancer activates the chemical, which then kills the cancer cells that have absorbed it. Photodynamic therapy may be used to reduce symptoms of lung cancer -- for example, to control bleeding or to relieve breathing problems due to blocked airways when the cancer cannot be removed through surgery. Photodynamic therapy may also be used to treat very small tumors in patients for whom the usual treatments for lung cancer are not appropriate.