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Smokeless tobacco keratosis (STK) [4] is a condition which develops on the oral mucosa (the lining of the mouth) in response to smokeless tobacco use. Generally it appears as a white patch, located at the point where the tobacco is held in the mouth. The condition usually disappears once the tobacco habit is stopped.
Black hairy tongue syndrome (BHT [4]) is a condition of the tongue in which the small bumps on the tongue elongate with black or brown discoloration, giving a black and hairy appearance. The appearance may be alarming, but it is a harmless condition.
There is a similarity between this appearance and that of hairy leukoplakia, linea alba and leukoedema. [2] In people with human immunodeficiency virus , who are at higher risk of oral hairy leukoplakia, a tissue biopsy may be required to differentiate between this and frictional keratosis from cheek and tongue chewing.
Tobacco smoking or chewing is the most common causative factor, [29] with more than 80% of persons with leukoplakia having a positive smoking history. [1] Smokers are much more likely to develop leukoplakia than non-smokers. [ 1 ]
Tongue lesions are more common in persons who wear dentures and tobacco users. [10] The most common tongue conditions are geographic tongue, followed by fissured tongue and hairy tongue. [ 10 ]
The tongue of a cancer patient turned black and hairy, likely as a result of a rare reaction to antibiotics used in her treatment doctors say. ... As well as some antibiotics and poor oral hygiene ...
Smoker melanosis in a patient consuming 2 packs of cigarette per day. Smoking or the use of nicotine-containing drugs is the cause to Smoker's melanosis. [10] [11] Tar-components (benzopyrenes) are also known to stimulate melanocytes to melanin production, and other unknown toxic agents in tobacco may also be the cause.
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