If present it could also be Leukoplakia, which is a condition where patches of keratosis appear as adherent white
patches on the mucous membranes of the oral cavity and throat
. It is a potentially pre-cancerous disease of the mouth and throat. A biopsy may help to diagnose this condition. The cause of leukoplakia is unknown, but tobacco, whether smoked, dipped or chewed, is considered to be the main culprit in its development. Treatment is with laser or cryotherapy.