While our knowledge about cancer is proliferating rapidly, our principles of cancer medicine for individual patients and for populations are evolving only gradually. Our fundamental understanding of cancer causes and deve lopment is incomplete, and our treatments are nonspecific and less often curative than we would like. Nevertheless, worldwide, our major challenge remains to apply to our populations all that we know about cancer. To meet this challenge, doctors everywhere need a broad view and under standing of cancer causes and control. This book is intended for doctors-in-training and...