Lung cancer is one of the most common and serious types of cancer. Over 41,000 people are diagnosed with the condition every year in the UK. Overall, about 1 in 3 people with the condition will live for at least a year after they are diagnosed and fewer than 1 in 10 people will live at least five years. As lung cancer does not usually cause noticeable symptoms until it has spread through much of the lungs or into other parts of the body, the outlook for the condition is not as good as many other types of cancer.