... ErythroplakiFloor of Velvety, reddish High risk of Chapter 032. Oral Manifestations of Disease (Part 5) Dermatologic Diseases See Tables 32-1, 32-2, and 32-3 and Chaps. 52 , 53 , 54 , 55 , and 56 . Table ... location of habit White patch that may become firm, rough, or red-fissured and ulcerated; may become sore and painful but usually painless May or may not resolve with cessation of habit; ... Painless white thickening of epithelium; adolescent/early adult onset; familial Benign and permanent Smoker's leukoplakia and smokeless tobacco lesions Any area of oral mucosa, sometimes...