Researchers now warn that nicotine based e cigarettes are likely carcinogenic, meaning they have the potential to cause cancer, specifically in the lungs and mouth. Learn more in our weekly news roundup. https: t.co i4xGiCxD0t Does Vaping Cause Oral Cancer? How Safe Are e Cigarettes? E cigarettes are likely to cause cancer, including in the lungs and mouth, according to a sweeping review of scientific evidence that challenges their positioning as a safer alternative to smoking. There is Vapes And Cancer Vaping and e cigarettes are likely to cause cancer in their own right, a comprehensive new review has concluded E cigarettes: 'cancer risk close to zero' Bhekisisa