Cases—be they real or fictional—are commonplace both in the medical ethics literature and in the public media. Cases take on a variety of forms: from streamlined to book length narratives. They also serve a variety of different purposes, from illustration, to decision making, and from debunking to heuristics. Drawing on the rhetorical analysis of « exemplum », I shall describe what cases are, and what their role is in the practice of clinical ethics. I identify two basic ways in which (...) cases can be brought to bear on ethical thinking and practice: a « tamed » and a « wild » way, and show how « wild cases » can serve a useful heuristic function despite their appeal to emotions and their unusual and striking character. In conclusion, I will argue that cases, both in their wild and their tamed form, are not only useful pedagogical tools, but can serve as a legitimate empirical basis for medical ethics. (shrink)