Knowledge of tumours of the salivary glands has advanced consider ably in the two decades that have elapsed since work was started on the first edition of Histological Typing of Salivary Gland Tumours. A great deal of information has been collected about newly de scribed tumour entities and the behaviour and prognosis of the pre viously classified tumours. Immunohistochemistry, cytophotometry, hybridization techniques, tissue culture and chromosomal analysis have increased our understandin...

The 1973 WHO classification of bladder tumours anticipated a probable need for eventual revision of the criteria for diagnosing papillary and flat bladder neoplasia. A workshop sponsored by the WHO consisting of pathologists, urologists, cytologists, oncologists and basic scientists interested in bladder tumours addressed this subject, and after a follow- -up meeting sponsored by the International Society of Urological Pathology, the classification and terminology used in this text were ag...

There are two major differences in concept between this volume and others in the International Histological Classification of Tu mours series. The first of these is the inclusion of more clinical aspects than has usually been the case and the second is a con centration on a more limited range of conditions. There are sev eral reasons for adopting this approach. With regard to both cancer and pre cancer of the oral mucosa, we believe it is impor tant that general pathologists, in whose inte...