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A form of smokeless tobacco usually placed in the oral cavity or inhaled into the nasal cavity. Nicotine is absorbed into the body through the mucous membranes. Early signs of mucosal change include superficial wrinkling, a colour change to white or pale grey, and a thickening with the formation of deep furrows. The use of snuff can result in a number of malignant or potentially malignant oral lesions such as squamous cell carcinoma, verrucous carcinoma, leukoplakia, and erythroplakia.

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