Young adult cancer survivors more likely than peers to use e cigarettes E cigarettes are likely to cause lung cancer and oral cancer E cigarettes: 'cancer risk close to zero' Bhekisisa Electronic cigarettes (e cigarettes) are sometimes called e cigs, vapes, vape pens, and electronic nicotine delivery systems (ENDS). E cigarettes come in many shapes and sizes. Most e cigarettes contain nicotine. Get the facts about e cigarettes, E cigarettes 'likely' to cause two different types of cancer due to 'tumour causing chemicals damaging DNA'