Can alcoholism lead to cancer?

Yes. Excessive alcohol use increases the risk of many cancers such as breast, liver, stomach, esophageal, colon, pancreatic, head and neck cancers. Recent study suggested that even moderate use does increase breast cancer risk.
Yes. Alcohol use is associated with cancers of the mouth, esophagus, liver and may be breast. It may promote other cancers as well. It damages your liver, pancreas, brain and unborn baby, even if it does not cancer.