The outstanding success of the First Edition and the expansion of our knowledge about cancer over the 5 years since its publication have led to the decision to publish a Second Edition which has been fully revised, rewritten and enlarged by the addition of several sections. The First Edition was translated into Italian, Japanese, Polish, and Serbo-Croat and it is expected that additional translations (French, German, Spanish, Portuguese, etc. ) will make this Second Edition a truly international basic cancer Manual. The Revision Committee is convinced that all students and general physicians should know: (a) the important basic aspects of cancer; (b) some details of the most common cancers; and ( c) a few important points about the less common cancers. An attempt has been made to strengthen Part I, General Aspects, which is considered to be the most important part of the Manual for the world's physicians. However, the most common cancers in one part of the world are not necessarily the same in other parts and it is planned to work with local groups to produce adaptations and translations as seem appropriate. In particular, the UICC is anxious to work with local, national, and international committees to help improve the educational experience of students and general physicians in the geographic areas in question. Regional Conferences held by the UICC in Latin America, Asia and the Middle East have resulted in initial plans to accomplish this aim.

With the fall in mortality from infectious diseases, the* impact of childhood cancer in the Western World has increased to become the second commonest cause of death in the age group 1-14 years, being surpassed only by accidents. However, even in those countries in which paediatric cancer is attracting increasing interest, the disease is relatively uncommon, and the number of cases seen by any one physician, even in a large general hospital, is often limited to one or two a year. The widely held view by parents and even by many doctors that cancer in childhood is usually untreatable and inevitably fatal is no longer tenable. With improvement in the therapeutic response or in the actual survival rates of children with such lesions as Wilms' tumour, brain tumours, rhabdomyosarcomas, Ewing's sarcoma, retinoblastoma, lym phoma and even leukaemia, there is a real hope of achieving a substantial reduction in the mortality of childhood cancer. Paediatric oncology is, in fact, providing a vigorous stimulus to the much wider field of cancer treatment and research, and is demonstrating the advantages of a multi-disciplinary cooperation in the management of this disease.

th At the 6 International Cancer Congress held meantime the new committee has endeavored at Sao Paulo a list of tumors, intended to produce a simple, generally acceptable primarily for the purpose of statistical codi- tumor nomenclature founded on logical prin- fication, was presented and accepted with ciples of pathology. slight alterations only. This list had been A first draft without pictures was published in prepared by the Committee on Tumor Nomen- "ACTA" Vol. XIV No. 3-1958, which is now clature and Statistics, of the International followed by an illustrated edition. We are Union against Cancer, under the chairman- greatly indebted to all the authors and publish- ship of Dr. PERRY. It had also served as ers for permission to use their illustrations and a basis for the somewhat simplified code for providing us with the original prints. submitted to WHO, which circulated it Unfortunately it was not possible to obtain as document WHO/HS/CANC/24.1. An al- the original prints for the figures from the phabetical index to the code, mostly ba- Atlas of Tumor Pathology; we therefore had sed on terms in use in the United States, to use the printed illustrations for repro- constitutes part 2 of this document (WHO/ duction and are grateful to the Armed HS/CAN/C24.2). Forces Institute of Pathology for permission The preparation of a list of descriptive terms to use them.