10. Lung cancer
One of the most common types of cancer is lung cancer. It is one of the most deadly types of all but often goes undetected due to its lethality. As a result, it is estimated that more than five million people in the United States alone will die from lung cancer each year. The symptoms of this disease often do not appear until much later, which makes the diagnosis of the disease especially difficult. Symptoms include shortness of breath, coughing, and chest pains.