Smokeless tobacco is an etiologic agent for oral and pharyngeal cancers.[4]
Cigar smoking is an important risk factor for oral cancers as well.[5]
Other potential environmental carcinogens include marijuana and occupational exposures such as nickel refining, exposure to textile fibers, and woodworking. Cigarette smokers have a lifetime increased risk for head and neck cancers that is 5- to 25-fold increased over the general population.[6]
Nasopharyngeal cancer occurs endemically in some countries of the Mediterranean and Asiat, where EBV antibody titers can be measured to screen high-risk populations.[7]
Nasopharyngeal cancer has also been associated with consumption of salted fish, which may contain high levels of nitrites.
↑Murata M, Takayama K, Choi B, Pak A (1996). "A nested case-control study on alcohol drinking, tobacco smoking, and cancer". Cancer Detect Prev. 20 (6): 557–65. PMID8939341.CS1 maint: Multiple names: authors list (link)
↑Winn D. "Smokeless tobacco and aerodigestive tract cancers: recent research directions". Adv Exp Med Biol. 320: 39–46. PMID1442283.
↑Iribarren C, Tekawa I, Sidney S, Friedman G (1999). "Effect of cigar smoking on the risk of cardiovascular disease, chronic obstructive pulmonary disease, and cancer in men". N Engl J Med. 340 (23): 1773–80. PMID10362820.CS1 maint: Multiple names: authors list (link)
↑Andre K, Schraub S, Mercier M, Bontemps P (1995). "Role of alcohol and tobacco in the aetiology of head and neck cancer: a case-control study in the Doubs region of France". Eur J Cancer B Oral Oncol. 31B (5): 301–9. PMID8704646.CS1 maint: Multiple names: authors list (link)
↑ 7.07.17.2Everett E. Vokes (2006). "Head and Neck Cancer". Head and Neck Cancer. Armenian Health Network, Health.am. Retrieved 2007-09-25. Unknown parameter |month= ignored (help)