Clinicopathological and prognostic profile of non-smoking and non-drinking head and neck cancer patients: a population-based comparative study.

Tobacco and alcohol consumption are the main risk factors for head and neck cancer (HNC). However, some individuals do not have a history of addiction and even so they develop the disease. This study evaluated clinicopathological and prognostic features of non-smoking and non-drinking (NSND) HNC patients.