Dermatopathology is evolving as a significant subspecialty. In most instances, the increasing workload may be readily dealt with by the experienced pathologist. Many dramatic changes, however, have occured in dermatopathology which necessitate a review in a number of areas. This volume provides such a review of selected topics. The contributions by internationally recognized experts deal with the impact of HIV on the skin, the application of molecular techniques in infection, the understanding of fibrohistiocytic tumours, differentiating Spitz from Spitzoid melanomas and toxic epidermal necrolysis from graft-versus-host disease, as well as the recognition and updated classification of primary lymphomas. This text is undoubtedly valuable to histopathologists and dermatologists who, often together, diagnose, manage and provide therapy in this exciting medical field.