The only thing worse than being told that you have developed cancer again after you have been diagnosed cancer free or in remission, is being told you have the same type of cancer as the one that you have just beaten. Researchers in a study in Denmark have found that the incidence of getting the same cancer type is almost twice as high as getting another type of cancer. This especially applies to cancer associated with tobacco such as gum, lung, and others. They didn't mention the fact that a remission only means that the cancer could come back, but the data was probably from those that were cancer free although I cannot speculate as to that.
Here is the article: