disease is illustrated by outstanding representative clinical color photographs juxtaposed with a concise text delineating the clinical signs and symptoms. For the third edition, the text has been thoroughly revised to keep pace with new concepts in oral medicine. The structure of the text has been clarified and made more practically useful, with references to etiology, clinical images, differential diagnosis, labaratory diagnostic tests, and therapy guidelines. Also new in the third edition: four new chapters, and more than 240 new, exquisite illustrations of lesions and pathologic conditions affecting the oral cavity.