... cessation of habit; 2% develop squamous cell carcinoma; early biopsy essential ErythroplakiFloor of Velvety, reddish High risk of Chapter 032. Oral Manifestations of Disease (Part 5) ... Smoker's leukoplakia and smokeless tobacco lesions Any area of oral mucosa, sometimes related to location of habit White patch that may become firm, rough, or red-fissured ... 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 32-3 White Lesions of Oral Mucosa Condition Usual Location Clinical...