The cases presented in this book will guide the reader through the process of making a diagnosis based on logical thinking. The book provides a wealth of knowledge regarding diagnostic approaches and pearls of wisdom. In addition to unusual presentations of common diseases, it includes discussions about rare diseases, complex cases, surprising diagnoses, therapeutic challenges and other important features. Becoming acquainted with such unusual cases will provide the dermatologist with increased knowledge, a wider perspective, and innovative techniques that can be used to solve diagnostic dilemmas. Readers will improve their way of thinking and data analysis, and will be able to improve differential diagnoses. This book provides the unique feature of a strategic way of thinking while discussing each case, in order to reach a diagnosis. The text includes comparisons of each case to other similar cases, pointing out the distinguishing features of conditions under consideration.