NCIt definition : A white patch or plaque on a mucous membrane that cannot be characterized clinically
or pathologically as any other disease. The diagnosis of leukoplakia is one of exclusion;
other conditions such as candidiasis, lichen planus, leukoedema, etc., must be ruled
out before a diagnosis of leukoplakia can be made. Leukoplakia may be a premalignant
condition.;
Alternative definition : NICHD: Thick, white or gray patches on the oral mucosa.; NCI-GLOSS: An abnormal patch of white tissue that forms on mucous membranes in the
mouth and other areas of the body. It may become cancer. Tobacco (smoking and chewing)
and alcohol may increase the risk of leukoplakia in the mouth.;