A study on 132 patients of Head and Neck cancer in South East Asia was conducted by Arifa Aziz et al. As per this study,  Head and neck cancers were observed to be more common in males 101 (76.5%) as compared to females 29 (22%). The commonest environmental factors causing head and neck cancer included various forms of smokeless tobacco including pan, mainpuri, supari and gutka. Out of 132 patients, 77 (58.3%) were using smokeless tobacco, 41(31.1%) were cigarette smokers and 6 (4.5%) were using alcohol. The commonest cause was found to be different forms of smokeless tobacco easily accessible to the public. Read more