True whitening of the upper lip semi mucosa, the most affected region, is common, due to a large number of grouped sebaceous glands, which leads patients to seek care because of health concerns or aesthetic reasons.5 Histopathology reveals sebaceous glands as found in the skin.4 Leukoedema It is a condition of the oral mucosa often found in black-skinned individuals, although it is not exclusive in this population
Reinders, J
Bellone J, Ghizzoni L, Amaretti G, Volta C, Boghen MF, Bernasconi S, Ghigo E
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Time-dependent cytotoxicity was most evident at 580 M as the cell viability was greatest at 24 h, followed by 48 h and the least at 72 h