In May 2019 researchers from the UK and Germany published their review of the medical scientific literature to assess the association between e-cigarettes and head and neck cancer, as a wide variety of potentially harmful chemical compounds have been identified in e-liquids and aerosols of e-cigarettes. A total of 18 studies were included in the review. Results showed that some studies suggested DNA-damage following exposure to e-cigarettes possibly due to increased oxidative stress. Flavoured e-liquids appeared to be more harmful. The researchers concluded that there appear to be potential dangers associated with the use of e-cigarettes which may have a role in head and neck cancers. However, it was noted that many studies were of low quality. Further research is required.
Flach S et al. E-cigarettes and head and neck cancers: A systematic review of the current literature. Clin Otolaryngol. 2019 May 30. [Epub ahead of print]