This book presents twenty-nine case studies that identify the most important ethical issues likely to emerge from new technologies of genetic testing and develops a series of guidelines based on the case studies. The authors believe that guideline formation is dependent on case analysis and that any statement of general guidelines must follow from concrete, practical discussion of specific situations. For these reasons, the guidelines presented are rooted in the case discussions and follow from the resolution of the cases. By providing the clinical origins and rationale behind each of its recommendations, the book aims to provide guidance for thinking through the ethical issues as well as a starting point for development of additional guidelines.