This book is intended to serve as a desktop reference for students of dermatology and pathology, a supplement to large standard textbooks. It is designed to provide information in an accessible, student friendly format, by means of numbered points. Other key points are highlighted in italics and text boxes, and the frequent insertion of tables helps the student to absorb and remember. Where necessary, simple explanations are provided to explain difficult concepts. Also included are decision trees and an algorithmic approach to assist in the diagnosis of reaction patterns. At the end of each chapter is a table of summary of findings in important conditions. This is an expanded, improved, updated edition of an already successful title and will prove to be a useful addition to the course books available to dermatology and pathology students.