The purpose of this book, which is written mainly for pharmacothera pists, is to draw the physician's attentions, through specific examples, to iatrogenic (i.e., diagnostically or therapeutically induced) carcino genesis. The book is not intended, however, to arouse public concern. It has been known for some time that each therapeutic measure has a risk-benefit ratio, the estimation of which requires an understanding of carcinogenic side-effects. The number of iatrogenic tumors published s...