Squamous cell carcinoma of the tongue associated with cinnamon gum use: a case report.

Background: Cinnamon aldehydes found in cinnamon-flavored gums can incite mucosal alterations at points of contact with the oral mucosa. These alterations may include inflammation and epithelial proliferation, but as a rule, the changes are reversible and promptly resolve when gum-chewing activity is discontinued.
Methods: The authors report a case of a 24-year-old woman who developed a squamous cell carcinoma of the tongue following persistent and prolonged exposure to cinnamon-flavored gum.
Results: Several social, clinical, and histopathologic features point to the cinnamon-flavored chewing gum as a possible causal factor in the development of the patient's oral carcinoma.
Conclusions: Prompt withdrawal of cinnamon products is encouraged in heavy gum chewers who develop cinnamon-related oral lesions. For those lesions which do not promptly resolve upon cinnamon withdrawal, diagnostic biopsy should be considered to exclude the possibility of a squamous cell carcinoma.