Artificial sweetener consumption has a possible chance of cancer induction.
For aspartame, there are some researches show that aspartame can cause mice to have brain tumors which indicates there is a possible chance of aspartame consumption that can induce cancer.
For sucralose,which is a kind of organochlorine, is usually considered as carcinogenic. However, due to its extreme low solubility in fat, it is not likely to cause cancer than that of aspartame.