Differing from others in the Histological Typing series, this book includes more clinical aspects and concentrates on cancer and precancer of the oral mucosa rather than attempting to cover all benign and malignant tumors of the oral and oropharyngeal tissue. One main aim is to inform general pathologists of the clinical features of the various lesions discussed as, on the whole, they may be unfamiliar with this territory. Attention is also drawn to those conditions particular to the oral mucosa that may give rise to appearances which are important in differential diagnoses but can be misleading to the pathologists who does not have detailed knowledge of the tissue involved. The TNM-classification for malignant tumors of the lip and oral cavity is also included.