Dermatopathology is both exciting and exasperating. tum corneum cells. This occurs in disorders of keratiniza Skin has an elegant simplicity in its functions yet a tion because the process of desquamation is disturbed (Figure 1. 1). ferocious complexity in its structure. This is one of the paradoxes that underly the pathology of skin disease Parakeratosis. The presence of nucleated horn cells in and may go some way in explaining the multitudinous the stratum corneum. Normally the horn cells (corneocy disorders to which the skin is subject. The ready visibility tes) are thin lamellae of less than 1 f. lm thickness. They of the skin may also help explain why straightforward contain no detectable cytoplasmic contents as these are histological examination cannot always provide an lost in the granular cell layer. Parakeratosis occurs when answer to a clinicians's question. Quite dramatic appear the process of keratinization is disturbed such as when ances may be due to alterations of the relative rates of the rate of epidermal cell production is increased (as in blood flow, with or without oedema, in the different psoriasis) so that nuclei are not broken down before the vascular plexuses or around different structures in the stratum corneum is reached and when damage occurs horizontal dimension, neither of which may result in to the upper epidermis (Figure 1. 2). 'much to see' histologically. The inherent sampling error Porokeratosis.

This atlas contains more than 700 illustrations that the authors have collected over the years as well as references and information pertaining to recently developed drug classes, including biologics. It is a useful bench reference for practicing pathologists and may also be used as a reference text by other experts from related fields. The atlas is organised into different chapters based on systemic pathology. Each chapter has illustrations with legends, and the atlas includes some rare examples of unique lesions found during toxicity studies over many years.

Based on Lever's Histopathology of the Skin, Ninth Edition, this full-color atlas presents an algorithmic pattern recognition approach to differential diagnosis of skin diseases. Whereas Lever's classifies diseases by pathogenesis, this atlas aids in differential diagnosis of unknown cases by classifying diseases morphologically, based on their location in the skin and the patterns and cell types seen through the microscope. Within each morphologic category, prototypic disorders are described and illustrated with full-color photomicrographs, and a list of differential diagnostic possibilities is presented. The atlas contains over 1,300 full-color illustrations. A bound-in image bank CD-ROM contains all the book's illustrations.

Of all the techniques used to treat non melanoma skin cancer, the highest cure rates belong to the Mohs surgical procedure. Critical to this technique is optimal preparation and interpretation of frozen sections. The second edition of this highly successful atlas details both common and uncommon cutaneous neoplasms that can serve as a source of reference for established practitioners and a review for those in training. It includes new frozen section specimens, the most current diagnostic guidelines, and discussion of the advancements in tissue staining. There is also an additional chapter with self-study tools, where readers can test their knowledge using various images with a multiple choice answer format, followed by a discussion of the correct answer. With high resolution figures, the Atlas of Mohs and Frozen Section Cutaneous Pathology, Second Edition is the premier text on the topic, serving as a highly practical guide to microscopic analysis, diagnosis, and discrimination of common and problematic cutaneous neoplasms. Highlights of the Atlas include diagnosis of basic and routine dermatologic entities, diagnosis and distinction of rare and/or deadly neoplasms such as dermatofibrosarcoma protuberans and merkel cell carcinoma, a troubleshooting guide dealing with quality control of the frozen section technique, and discussion of techniques including immunohistochemistry. Comprehensive and presented in full color, the Atlas of Mohs and Frozen Section Cutaneous Pathology, Second Edition is an indispensable reference for anyone involved with the Mohs procedure, including dermatologic surgeons, Mohs cutaneous surgeons, as well as pathologists and dermatopathologists who perform frozen section analysis of cutaneous specimens.

Of all the techniques used to treat non melanoma skin cancer, the highest cure rates belong to the Mohs surgical procedure. Critical to this technique is optimal preparation and interpretation of frozen sections. With more than 400 high resolution figures, the Atlas of Mohs and Frozen Section Cutaneous Pathology is the premier textbook on the topic, serving as a highly practical guide to microscopic analysis, diagnosis, and discrimination of common and problematic cutaneous neoplasms. Highlights of the Atlas include diagnosis of basic and routine dermatologic entities, diagnosis and distinction of rare and/or deadly neoplasms such as dermatofibrosarcoma protuberans and merkel cell carcinoma, a troubleshooting guide dealing with quality control of the frozen section technique, and discussion of new techniques including immunohistochemistry. Comprehensive and presented in full color, the Atlas of Mohs and Frozen Section Cutaneous Pathology is an indispensable reference for anyone involved with the Mohs procedure, including dermatologic surgeons, Mohs cutaneous surgeons, as well as pathologists and dermatopathologists who perform frozen section analysis of cutaneous specimens.

Biopsy of the gastrointestinal tract has been revolution less busy) teaching hospital. These sort of techniques, which I confess interest me greatly because of the ized by the introduction of fibreoptics; the proximal additional information which they can yield when rightly reaches, as far as the second part of the duodenum, and chosen, are naturally linked with improved methods of the whole large bowel back to the caecum can now be tissue preservation in general, bearing in mind that the sampled under direct vision and multiple small biopsies need for special techniques often becomes apparent can be obtained. Only in the jejunum and ileum are there only when the biopsy has been conventionally still limitations on the sampling of localized as opposed to generalized conditions. The sheer volume of gastro processed and examined. However, I have firmly intestinal material passing through our own laboratories stabled this hobbyhorse and have included little that has risen steeply over the last years to form some 25% cannot be done in a district general hospital and nothing that I am not prepared to do myself. I have tried to of the total current work load and the rise continues; stress, particularly, common lesions which can cause nearly all of it is in biopsy form rather than as resected specimens.

This book is intended as a practical bench manual phological abnormalities in renal diseases, and for the hospital pathologist who wishes to have where appropriate these have been illustrated. access to a simple informative account of renal Although the main emphasis is on the pathology, pathology, particularly for the interpretation of the relevant clinical aspects of the conditions cov percutaneous needle biopsy specimens. I n addition ered are included in recognition of the fact that we trust it will be valuable to physicians working renal disease is an area in which correlation of the in the field of renal disease, for whom the interpre clinical and histopathological findings is particularly tation of renal biopsy material is directly relevant to important in reaching an informed diagnosis. patient management. Whilst a comprehensive coverage more appro priate to a larger text has not been attempted, the Acknowledgements text has been planned to give an adequate account of the more important non-neoplastic disease pro We would like to thank the technical staff of the cesses and their pathological appearances in the Histopathology Laboratories of The London Hos kidney. Points of difficulty in interpretation and dif pital Medical College, The Hospital for Sick Chil ferential diagnosis are covered both in the text and in dren, Great Ormond Street, and Guy's Hospital the illustrations.

This comprehensive book, lavishly illustrated with over 700 colour pictures, addresses the subject of bone in internal medicine. It is based on biopsies of bone and first describes the normal range of physiological findings in iliac crest biopsies in young, middle-aged and elderly individuals. The book then deals systematically with the osseous disorders most frequently encountered in internal medicine, and some that would be considered in the differential diagnosis. Numerous up-to-date references are included. The clinical applications of biopsies of bone are emphasized as well as their clinical interpretation; sections on histomorphometry and functional aspects of bone cells are also included. The book will be of particular interest to specialists in internal medicine, endocrinology, nephrology, haematology and oncology, as well as being a bench manual for the practising pathologist.