Effect on oral leukoplakia of reducing or ceasing tobacco smoking.

Oral leukoplakia patients who were smokers were asked to give up their smoking habits. It was found that leukoplakias present in persons with smoking habits might be reversible, when the smoking habit was reduced or given up. Leukoplakias which were not reversible could possibly be of the same idiopathic type as leukoplakias in non-smokers.