This book is based on the proceedings of a successful Boerhaave International Symposium on colorectal cancer held at the University of Leiden, 6-9 June, 1979. I would like to offer grateful thanks to the eminent clinicians and scientists who contributed both to the Symposium and to this book. Colorectal cancer is a very common form of malignancy, particularly in the Western world, and there have been a number of recent developments in the management of this condition. This book has attempted to collate informa tion on the current methods of investigation and treatment and I believe that it...