,,1m Kleinsten die wirkliche Wahrheit gibt graBen Gedanken erst Klarheit" KARL THOMAS Each year sees the publication of hundreds of reports of experimental work on the lymphatic tissue, yet morphological studies of the cells involved can be counted on the fingers of one hand. Furthermore, anyone who tries to identify these cells by morphological criteria is accused of sophistry and hair splitting, whereas it is accounted scientifically correct and unbiased to speak of "lymphoid cells", "blast cells" etc. Not so many years ago things were different: there were too many names and too many classifi cations and everyone backed his particular fancy. People thought of cells in terms of rigid classes, nothing then being known about the transformability of mononuclear blood cells. Today we must look for the middle way: cells should be named and defined according to morpho logical criteria but their transformation potential should be borne in mind. Once the cells are analysed and subdivided, it will be simple enough to set up proper classifications afterwards. This book arose out of the conviction that there should be more criteria and more information available on the morphology of human lymphoreticular cells; previously such information had been restricted by the difficulty of the special hematological and cytochemical staining methods.

Introduction to Electron Microscopy, Second Edition provides an introduction to the foundations of electron microscopy; an outline of some practical aspects of instrument operation; and discussion of the rationale of the methodology of biological specimen preparation. The book seeks to provide a comprehensive understanding of the theoretical and operational aspects of the electron microscope. This edition consists of two parts. Part One deals with the history, basic theory, and operation of the electron microscope. Part Two discusses steps used in material preparation for electron microscope investigation such as fixation, embedding, and staining techniques. Biomedical researchers, molecular biologists, toxicologists, forensic investigators, and medical students will find this book a very useful reference.

Now in its Fourth Edition, this comprehensive, practical, and thoroughly illustrated reference offers valuable guidance in the diagnostic interpretation of lymph node biopsies. It provides encyclopedic coverage of all the various nonmalignant lesions, lymphomas, other neoplasms, and metastatic tumors in lymph nodes. The discussion of each pathologic entity includes definition, clinical syndrome, histopathology, and differential diagnosis. This edition has more than 700 illustrations, including over 600 in full color. Dr. Ioachim is joined by a new co-editor, L. Jeffrey Medeiros, MD, from the University of Texas MD Anderson Cancer Center. All chapters have been extensively revised and a new chapter on genetics has been added. A companion Website will offer the fully searchable online text and an image bank.

Diagnostic Electron Microscopy of Tumors, Second Edition is a guide on how to employ electron microscopy techniques in making evaluation on tumor biopsies. This edition aims to serve as a source of information, references, and electron micrographs for the practicing electron microscopists. This book is divided into five parts; each of which tackles a different topic. Part 1 discusses the collection of specimen, and Part 2 talks about the assessment of tumors' behavior and growth. Ultrastructural analysis of diagnostic problems is covered in Part 3; the significance of some ultrastructural features in tumors is explained in Parts 4 and 5. This text is recommended for those who wish to examine tumor biopsies with an electron microscope as well as those who want to become more conversant with such matters, so that they can understand and evaluate electron micrographs and reports. This book will be valuable to physicians, surgeons, histopathologists, and pathology residents.

Fully revised and up- to- date, Ioachim's Lymph Node Pathology, 5th Edition, offers valuable guidance in the diagnostic interpretation of lymph node biopsies. Continuing the tradition of excellence established by Dr. Harry L. Ioachim, Dr. L. Jeffrey Medeiros of The University of Texas MD Anderson Cancer Center offers a comprehensive, clinically useful approach to all the various nonmalignant lesions, lymphomas, other neoplasms, and metastatic tumors in lymph nodes. Discussion of each pathologic entity includes definition, clinical syndrome, histopathology, immunopathology, molecular genetic findings, and differential diagnosis. In addition, chapters have a useful checklist for each entity.

Due to the topology and structure of the lymph nodes, their role in the pathogenesis and development of diseases is a very special one. Each organ and even each organ-related region of the body has its own group of lymph nodes, specific topological reactions, such as in circumscribed inflammation or in the metastatic spread of malignant tumors. On the other hand, all the lymph nodes of an organism join in a uniform function effected by highly differentiated structures. Volume 84 of Current Topics in Pathology presents our current knowledge about the structure and reaction patterns of this "sec ondary" lymphoid organ. Despite our original intention to publish all the contributions in one book, it became necessary to divide them: Part 1 focuses on the involved nodal compartments, cell types, and functions, while Part 2 describes their reactions in inflammatory, neo plastic, and immune-deficient diseases. Even with the cooperation of more than 30 authors, the coverage cannot be exhaustive. The scope of both parts is limited to those reactions that can be described by direct and indirect morphological methods, including modern tech niques such as immune electron microscopy.