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.