What are the common types of cancer? In this article, Ty Bollinger will explain the 12 most diagnosed types of cancer, such as: #1 Lung Cancer - the primary cause is smoking, #2 Liver Cancer - cause is usually alcohol abuse, a birth defect, or chronic infection. #3 Stomach Cancer - diet, smoking, & alcohol consumption are believed to elevate your risk of this. Click through to find out more as Ty gives you all the pertinent info. Please pin to save for later!