In this second edition of the Histological Typing of Skin Tumours, the concise format of the first edition has been maintained. The number of tumours described, however, has increased considerably, especially in the melanocytic, adnexal, fibrous tissue and lymphoid neoplasms. Care has been taken to avoid needless subclassification, with the aim of limiting the expansion of categories to those fulfilling demonstrable histological criteria. The commentaries remain succinct whilst including the major diagnostic points, with reference to relevant immunohistochemical features.More than 200 new illustrations are included. Close collaboration with the authors of the AFIP Atlas of Tumor Pathology on Melanocytic and Non-melanocytic Tumours of the Skin ensures a consistent approach to the classification of skin tumors