contributing factors have been eliminated or corrected or when ID: 884515
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1 benign condition of the top (or dorsum)
benign condition of the top (or dorsum) of the tongue caused by lengthening of the ÒhairsÓ or ÒpapillaeÓ on the tongue that is made up of a material called keratin. Coated/hairy tongue develops when the keratin accumulates more than normal, leading to a coating or thickening of the tongue dorsum. In many cases, the coating appears white, although this may become stained black or brown by tobacco and food. Bacteria that normally live on the tongue also produce pigments that are harmless but can cause your tongue to look brown, yellow, black (Òblack coated/hairy tongueÓ) or even greenish. Although their names are similar, it is important not to mistake the term Òhairy tongueÓ with Òhairy leukoplakiaÓ which is a completely unrelated condition that a!ects the sides of the tongue. contributing factors have been eliminated or corrected or when