Nonmelanocytic tumours of the skin form a large and heterogeneous group of lesions, ranging from common to extremely rare, which often appear to the practising pathologist to blend into one another and are difficult to identify correctly, especially in specimens, which often represent limited biopsies. There may be more different entities in this group than in any other organ system. The table of contents of this encyclopedic work reveals a total of 226 tumours and tumour-like lesions discussed by the authors. For each of these entities, they present the distinctive clinical and pathologic features, as well as an extensive differential diagnosis. Special studies, including immunohistochemistry, electron microscopy, and molecular profiles are presented where appropriate. The text is complemented by over 880 illustrations (almost exclusively in colour) and over 3,000 references through to 2005. This publication and the forthcoming volume on Melanocytic Tumors will serve as the most comprehensive and useful guides available to cutaneous tumors and tumor-like lesions.