fashion this book presents the methodology employed in the clinical study of anticancer drugs within the broad context of cancer treatment. The research orientation promulgated in the study of new drugs is a central theme in most oncolo­ gists' approach to the clinical problem of cancer. Therefore, we hope that this book will introduce readers to treatment research in clinical oncology. For the oncologist, the clinical evaluation of antitumor therapy is both part of the day-to-day management of specific patients and the critical considera­ tion of developing therapeutic alternatives. For physicians in other fields of medicine it is important to acquaint themselves with the basic tools of the oncologist. For people without medical training, including patients who might be interested in treatment research, many of the chapters may be overly technical.