Some general cancer questions can be addressed. Cancer generally occurs because of many reasons. In most people no single factor can be assumed as the single cause of cancer. The most common factors that contribute to the development of cancer include smoking tobacco and drinking alcohol. Although, since not everyone who takes part in these activities develops cancer, there are other factors that are important. Among these factors in a person's genetics. While only a very small percentage of cancers are linked to a specific inherited gene, there