,,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.

,,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.

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.

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.