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In 2024, there were an estimated 2.96 million new cases of trachea, bronchus, and lung cancer worldwide. Breast cancer was the second most common cancer type with around 2.4 million new cases worldwide. 

Number of new cancer cases

Cancer can be caused by internal factors like genetics and mutations, as well as external factors such as smoking and radiation. It occurs in the presence of uncontrolled growth and spread of abnormal cells. However, many cancer cases could be prevented, for example, by omitting cigarette usage and heavy alcohol consumption. Risk of developing cancer tends to increase with age and is most common in older adults. Nevertheless, cancer can develop in individuals of any age. Cancer can be treated through surgery, radiation, and chemotherapy, among other methods.

In the United States, there will be an estimated 2.1 million new cancer cases and 611,720 deaths in 2026. Among U.S. men, prostate cancer and lung and bronchus cancers are the most common cancer types as of 2024, totaling an estimated 299,010 and 116,310 cases, respectively. In women, breast cancer and lung and bronchus cancer are the most common newly diagnosed types, totaling 310,720 and 118,270 cases, respectively.