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Smoker's melanosis is seen with the naked eye as a brown to black pigmentation of the oral tissue i.e. the gums, [1] cheeks or palate [2] as well as in larynx. [3] [4] It is most often seen in the lower labial gingiva of tobacco users. Most easily it is found in Caucasians, due to their lack of a genetically caused melanin pigmentation. [5] [6]
Due to this, dark pigmentation may be visible on the oral mucosa or skin. [10] Most common oral sites include: buccal mucosa, lips, gums, hard palate or tongue. Intraoral sites are usually seen as the first sign and they usually develop prior to the skin lesions. [11]
Amalgam tattoo is a grey, blue or black area of discoloration on the mucous membranes of the mouth, typically on the gums of the lower jaw. It is a healthcare caused lesion, due to entry of dental amalgam into the soft tissues. It is common, painless, and benign, but it can be mistaken for melanoma
The cap is initially whitish, but later turns slightly brownish, with irregular dark-brown to nearly black blotches where it is bruised. In maturity, the surface is fibrous and tough, scaly and jagged, grayish brown in the upper part of the cap, and somewhat woody. The flesh is a pale pinkish brown. [12] The spore print is brown. [13]
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Nyssa sylvatica, commonly known as tupelo, black tupelo, black gum or sour gum, [2] [a] is a medium-sized deciduous tree native to eastern North America from the coastal Northeastern United States and southern Ontario south to central Florida and eastern Texas, as well as Mexico.
Gum depigmentation, also known as gum bleaching, is a procedure used in cosmetic dentistry to lighten or remove black spots or patches on the gums consisting of melanin. . Melanin in skin is very common in inhabitants in many parts of the world due to genetic fact
Young Tonkin girl with black painted teeth, c. 1905 Vietnamese old woman selling chewing gum. Her teeth have the dark red hue of betel chewers. In China there has been knowledge of the custom of teeth blackening throughout history, although it was not practiced in the domains of the Middle Kingdom, nor did the majority of its ethnic groups. [6]