NCIt definition : A clinical term that refers to the presence of a red flat and well defined lesion
on the oral mucosa that is not caused by trauma, vascular, or inflammatory processes.
It is a precancerous condition and is seen more commonly in middle aged or older males.
It is associated with tobacco and alcohol consumption. Microscopic examination reveals
severe epithelial dysplasia, carcinoma in situ, or invasive squamous cell carcinoma.;
Alternative definition : NCI-GLOSS: An abnormal patch of red tissue that forms on mucous membranes in the mouth
and may become cancer. Tobacco (smoking and chewing) and alcohol may increase the
risk of erythroplakia.;