While it is true that certain types of neoplasms, such as those of the pancreas and brain, are still lesions with a grave prognosis, there are many other common cancers for which appropriate treatment can be curative in substantial numbers of patients ..• This hopeful aspect of cancer is insufficiently appreciated, even by the medical profession itself; too many pessimistic patients find themselves consulting equally pessimistic physicians. WHO Expert Committee on Cancer Treatment *. The aim of this monograph is to present the latest information on the treatment of cancer, and the words quoted above from the report of a WHO Expert Committee on Cancer Treatment form an appropriate introduction to the subject. The pessimism to which they refer is still all too often characteristic of the attitude towards cancer and its treatment. The various chapters have been specially written for this monograph by specialists of international repute, and it will be noted that some of them were participants in the meeting of the WHO Expert Committee on Cancer Treatment mentioned above.