In the last decade tremendous progress has been made in the diagnosis and treatment of tumours of the mediastinum. The use of immunohistochemistry, molecular biology, electron microscopy, CT and MRI, and a better knowledge of tumour markers, has made for better diagnosis, often without the need for biopsy, in many cases. This in turn has clarified the classification and thus the epidemiology of tumours of the mediastinum, and modern radiotherapy, chemotherapy and surgery has led to improved survival of patients at risk. With over 300 illustrations, mostly in full colour, and a well-referenced text, this atlas is an invaluable bench reference for the practising diagnostic pathologist and a study aid for the trainee, as well as a comprehensive source of reference for oncologists and surgeons.

The localized attachment of circulating leukocytes to endothelium has been recognized as the cellular hallmark of the inflammatory response. This adhesive interaction, a necessary antecedent to the emigration of leukocytes from the blood into the tissues, is mediated by vascular adhesion molecules. Leukocyte Recruitment, Endothelial Cell Adhesion Molecules and Transcriptional Control: Insights for Drug Discovery outlines some of the cellular and molecular mechanisms of inflammation with contributions from top researchers. This volume provides an overview of three of these endothelial adhesion molecules, as examples of key mediators of leukocyte recruitment. It reviews the structure and regulation of these cell surface proteins and focus on the rapidly expanding field of transcriptional regulation of these inducible proteins, and closes with a discussion of drug discovery possibilities that target the regulation of leukocyte recruitment. This book will be of interest for any researchers, in academia or industry, looking for an overview of leukocyte recruitment or novel approaches to drug discovery.

The 1997 European Conference on Spectroscopy of Biological Molecules (ECSBM) is the seventh in a biennial series of conferences devoted to the applications of molecular spectroscopy to biological molecules and related systems. The interest of these conferences rests mainly on the relationship between the structure and physiological activity of biological molecules and related systems of which these molecular species form part. This volume ofECSBM contains articles prepared by the invited lecturers and those making poster presentations at the seventh ECSBM. The reader will find mainly applications of vibrational spectroscopy to protein structure and dynamics, biomembranes, molecular recognition, nucleic acids and other biomolecules and biological systems containing specific chromophors. Biomedical applications of vibrational spectroscopy are expanding rapidly. On the other hand, a significant number of the papers describe applications of other methods, such as NMR, circular dichroism, optical absorption and fluorescence, X-ray absorption and diffraction and other theoretical methods. One aim has been to achieve a well balanced, critically comparative review of recent progress in the field of biomolecular structure, bonding and dynamics based on applications of the above spectroscopic methods. A great part of the contributions included in this volume are devoted to biomedical and biotechnological applications and provide a broadly based account of recent applicationS in this field. The content of this book has been organized in sections corresponding mainly to the different types of biological molecules investigated. This book includes also another section related to theoretical methods where MO calculations of vibrational frequencies dominate clearly the topic.

INHALT: The Concept of the BBB: an Historical Perspective Anatomy of the BBB Pathophysiology of BBB * Brain oedema Breakdown of the BBB BBB Dysfunction after SAH * Clinical Monitoring Neuroradiological Evaluations of BBB Dysfunction after SAH * Computerised Tomography and Magnetic Resonance * SPECT and PET Experimental Data * Literature Review of BBB Dysfunction after Experimental SAH * Qualitative Assessments * Quantitative Assessments * Time Course of BBB Dysfunction after SAH * Additional Pathophysiological Changes after SAH - Cerebral Vasospasm - CSF Eicosanoids - Cerebral Metabolism - Behavioural and Neurological Deficits - Intracranial Pressure - Blood Pressure, Blood Gases, Plasma pH, Plasma Glucose, Body Temperature Strategies for Pharmacological Interventions * Hydroxyl Radical Scavenger AVS * Glutamate Antagonist Felbamate * Calpain Inhibitor II Challenges and Future Directions * Advances in Cerebrovascular Pathophysiology Elucidation * Gene Therapy

Historically we have separated the disciplines of Chemistry and Biochemistry by recognizing that the distinguishing characteristic of Biochemistry is the catalysis of reactions by enzymes. Enzymes permit metabolic reactions which would otherwise require extremes of temperature, pressure or pH, often associated with Chemistry, to proceed under ambient conditions of the body. Under some conditions chemical reactions occur in vivo in which products of enzymatic reactions proceed to undergo further reactions non- enzymatically with cellular macromolecules. The results can often be seen as toxic or carcinogenic responses. The chemicals that initiate these reactions are termed "biological reactive intermediates. " The International Symposia on Biological Reactive Intermediates (BRI) began in 1975 at the University of Turku, Finland and have since convened at the University of Surrey, Guildford, The United Kingdom (1980), the University of Maryland, College Park, Maryland (1985), the University of Arizona, Tucson, Arizona (1990), the GSF Forschungszentrum and Technical University of Munich (1995) and, most recently, at the Universite Rene Descartes, Paris, France (2000). The Symposium was organized by an International Planning Committee co-chaired by P. Dansette (Paris, France) and TJ. Monks (Austin, Texas). The committee included: P. H. Beaune (Paris, France), M. De\aforge (Saclay, France), G. P. Gervasi (Pisa, Italy), G. G. Gibson (Guildford, UK), H. Greim (Munich, Germany), DJ. Jollow (Charleston, South Carolina), P. Moldeus (Sodertalje, Sweden), I. G. Sipes (Tucson, Arizona), R. Snyder PJ. van Bladderen (Zeist, The Netherlands). They were (Piscataway, New Jersey), and assisted by an International Scientific Program Advisory Committee which included: TJ.

Endoscopic neurosurgical interventions gain in importance. This book gives adetailed description of the recent indi- cations of endoscopic procedures inmodern neurosurgery. They include endoscopic stereotaxy, endoscopic evacuations of intracerebral hematomas, cysts and abscesses as well as endoscopic interventions on brain tumors. An extended over- view about the usable endoscopes and the operative equipment is pointed out

VEGF and Cancer is a comprehensive and up to date review of current knowledge on the role of vascular endothelial growth factor (VEGF) in cancer. Key Features: -Discussion of VEGF as potent angiogenic factor and its role in tumor angiogenesis, -Review of the biology, molecular properties and regulation of VEGF, -Discussion of the role of VEGF in a range of different tumor types, both solid tumors and haematological cancers, -Review of the therapeutic potential of different approaches to block VEGF, -Review of recent evidence that in addition to its role as an endothelial cell mitogen, VEGF may also be an autocrine growth factor for tumor cells, regulating survival and invasion. This book is aimed at scientists new to angiogenesis and VEGF biology and provides new information for established researchers and scientists. It will also be a useful text for clinicians interested in anti-angiogenic therapy for treatment of human cancers.

It is well known that estrogen is "somehow a protective hormone for various age-related disorders. This book provides a solid knowledge of estrogen s neuroprotective activities in the brain with a special emphasis on neurodegenerative disorders such as Alzheimer s Disease. The focus is (1) to describe the biochemical, molecular, and cellular basis of the protective activity of estrogen and (2) to transfer this knowledge into the hospitals by discussing preventive and therapeutic approaches such as estrogen replacement therapy for post-menopausal women. Besides up-to-date information on estrogen and the brain, this book explains in a highly understandable manner molecular and cellular techniques by which basic data have been collected. The reader, which may include the professional specialist as well as the interested non-specialist, will also gain insight into the scientific transfer process of knowledge from basic science to the clinical situation and therefore "from bench to bed ."

The role of carcinogenic agents in the deveolopment of human cancers is now being defined using a variety of human cells as experi mental model systems. A workshop on "neoplastic transformation in human cell systems in vitro: mechanisms of carcinogenesis" was held at the Georgetown University Medical Center, Washington, DC, on April 25-26, 1991. The aims of the workshop were to present the state-of-the art in the transformation of human cells in culture, as well as to provide insight into the molecular and cellular changes involved in the conver sion of normal cells to a neoplastic state of growth. The following topics were closely related to the theme of the workshops: 1. Derivation of in vitro model systems (epithelial, fibroblastic, and hematopoietic). 2. Factors modulating cellular transformation. 3. Usefulness of defined in vitro model systems for viral, chemical, and radiation carcinogenesis. 4. Multistep nature of human cell carcinogenesis. 5. Role of activated and suppressor oncogenes in neoplastic trans formation. The workshop was organized by J. S. Rhim and A. Dritschilo (cochairmen), G. Jay, J. little, M. McCormick, R Tennant, and R R Weischelbaum. There were 32 speakers, 30 poster presentations, and about 190 participants."

This book is based upon a series of papers originally presented at a NATO Advanced Studies Workshop of the same title held at the study Center HI Cappuccini," a converted monastery in San Miniato, a small village located between Pisa and Florence, Italy, in October 1991. Authors were asked to submit their completed chapters by the following February; these were then scanned onto computer disks, edited and returned to the authors for final revision, and updating, with a final deadline of February 1993. The authors were encouraged to make whatever modifications they wanted, especially regarding updating their chapters, with an eye to making the final product both comprehensive and current. In this we succeeded beyond our expectations, with most chapters extensively altered and many completely re-written and significantly expanded. Thus, although the original meeting was held in 1991, the chapters in this volume may be regarded as current from at least February, 1993, with some of the final updated revisions received as late as July, 1993. This book, as agreed in our original contract, has been delivered to the publisher "camera-ready. " This means that all of the scanning, editing, proofing and typesetting were done here, by the office of the Department of Dermatology at the New Jersey Medical School. We essentially produced the book, which the publisher, for the most part, then photocopied. This has been an enormous burden, borne mainly by my colleague in this division, Robert A.

Chronic obstructive pulmonary disease (COPD) ranges amongst the commonest diseases in the world. The relentless progression of the disease causes a pressing need for a better understanding of and therapies for COPD. This volume provides state-of-the-art information on the pathophysiology of COPD including an outlook on new therapies. It is of interest to researchers and clinicians in academia as well as in the pharmaceutical industry.

Medical imaging is an important topic and plays a key role in robust diagnosis and patient care. It has experienced an explosive growth over the last few years due to imaging modalities such as X-rays, computed tomography (CT), magnetic resonance (MR) imaging, and ultrasound. This book focuses primarily on model-based segmentation techniques, which are applied to cardiac, brain, breast and microscopic cancer cell imaging. It includes contributions from authors working in industry and academia, and presents new material.

The study of atherosclerosis centered since the first decade of the present century on etiology and pathogenesis. In fact, the studies of the military academy of medicine in St. Petersburg have opened the way of inducing atherosclerosis in animals. Pathogenesis of atheroma has been studied since then in humans and animals naturally prone to the development of the disease and by a variety of dietary and other procedures. The various experimental studies allowed science to evaluate the relative importance of different factors (genetic, dietary, hormonal, pharmacological. mechanical, circulatory, etc.) in atherogenesis. Epidemiological studies as well as biochemical plasma lipid and lipoprotein estimations coupled with light microscopic, histo chemical and electron microscopic investigations decreased the gap between observations on the human and experimental animal research. The enormous literature covering this field allows the intelligent reader to formulate a comprehensive concept regarding etiological factors and pathogenesis of atherosclerosis. Its impact on pre ventive and curative medicine was however limited in scope."

For more than 35 years the Swiss Society of Neuropathology has organiseditstraditionalInternationalWinterMeeting.Themainaimofthis venue is to bring together neuropathologists and clinicians as well as neuroscientistsinterestedindiseasemechanisms.TheXVIIIthInternational WinterMeeting washeld inMarch 2000 in St. Moritz, Switzerland. The topicofthe2000Meetingwas"NeuropathologyandGeneticsofDementia." Aprogrammeofinvitedplenarylecturesofhigheducationalvalueaswellas platform andposterpresentations given by manyparticipantscoveredthe broadspectrumofdementingdisorders.Encouragedbythehighstandardof the meeting, and probably also influenced by the advent of a new Millenniumwedecided, togetherwithKluwerAcademiclPlenumPublishers, topublishtheProceedingsofthe2000Meetinginthepresentbook. The increaseofthe agedpopulation challenges social and health care systemsinindustrializedsocieties.Maintenanceofhealthandautonomyinto oldage isakeyfactor, andtheautonomyandindependenceofoldpersons crucially depend on mental health. However, neurodegenerative disorders accompanied bydementiaaffect 5-10%ofindividualsoverthe ageof65, and for the age group between 65 and 95 the prevalence of cognitive dysfunction doubles every 5 years. With this challenge in mind, Rossor discusses the clinical syndrome of dementia which encompasses an enormousvarietyofunderlyingdisorders. Over the last few years it has become apparent that many neurodegenerative disorders are characterised by protein misfolding and aberrant polymerization and may therefore be viewed as "aggregation proteopathies." Among them a substantial subsetofdementing disorders, either with or without motor dysfunction, are characterised by abundant v VI Preface neuronaland/orglialaccumulationofhyperphosphorylatedtauprotein.The molecular parametersofthese "tauopathies" are reviewed by Delacourte. Therecentdiscoverythatmutationsofthetaugenearecausativeforfamilial formsoffrontotemporaldementiaandParkinsonism(FTDP-17)broughtthe "taupathway"and the"tauopathies"tothecentrestage.Thisextraordinary breakthroughwillbecoveredbySpillantiniandGoedert.Thereisincreasing evidence that argyrophilic grain disease is much more frequent in older patients than previously thought. Tolnay et al. are reviewing recent contributionstothepathologyofthislate-onsetdementingdisorderinwhich ofamyloidbetadeposits, isalmost taupathology, inthealmosttotalabsence exclusivelyrestricted to the limbic lobe and the amygdala. Schultzet al. report an intriguing age-related progression of neuronal and glial tau pathologyinbaboonsthusrenderingthe baboonapotentialprimatemodel forage-relatedhuman"tauopathies." Gotzetal. introducetransgenicmice expressingmutated human tau as valuable animal models for reproducing formationofneuro-andglialfibrillarylesions.

This year marks the tenth anniversary of the International Symposium on Medical Virology. In the Foreword to the book of the 1980 Symposium, we stated, "However, the challenges still lying ahead are more numerous than our past accomplishments". Little did we know at the time, that within a few years the spread of human immunodeficiency virus type I was going to occur. This worldwide epidemic has, like no other disease in recent history, awakened the scientific community and the public at large. It is a reminder to all of us that regardless of our vast technical advances, Nature provides such great opportunity for biological diversity, that it will always be one step ahead of our scientific knowledge. Although our understanding of virology, molecular biology and immunology have increased by leaps and bounds over the last decade, we are still at the point of being unable to effectively control the spread of this viral infection. We hope that our Symposium this year has helped researchers to come together and exchange' ideas, so that our growing knowledge of viral infections will help produce better approaches to control them. Luis M. de la Maza Irvine, California Ellena M. Peterson March, 1991 v ACKNO~EDGEMENTS It would be impossible to single out all those individuals who helped us make this Symposium a reality, however, we would like to take this oppor tunity to express our appreciation for their efforts.

This volume represents a series of papers presented at the Second International Workshop on HPV Immunology held at the University of Cambridge July 5-7 1993. This Workshop and its predecessor held in Amsterdam in May 1992 were two of the major activities of the European Concerted Action "Immunology of Human Papillomavirus and Vaccine Development." The Concerted Action (CA) was supported by grants from the Commission of the European Communities (EC), the French Association for Cancer Research (ARC) and the European Association for Medical Research (EAMR). Twenty two laboratories throughout Europe and Scandinavia were members of the CA, the objectives of which were to develop collaborations, implement scientific exchanges and co-operate in a collective effort to develop vaccination strategies for HPV. HPV's are ubiquitous pathogens and evidence which has been accumulated over the past decade leaves little doubt that infection with certain HPV types (the so called "oncogenic HPV's" 16, 18 and their relatives) is the major risk factor in the development of cancer of the uterine cervix in women. Since an infectious agent, a virus, is implicated as the main aetiologic factor in this disease, the possibility is raised that if one could prevent HPV infection or treat established infections this would be an effective anti-cancer strategy against what is the commonest cancer in women worldwide."

The title of this monograph, Brain Tumor Research and Therapy, is the name of the Conference itself, which had its inaugural meeting in the United States in 1975 andhas since progressed to the international scale. In Japan, the first conference ofits kind was organized by Dr. Takao Hoshino and me and was held at Nikko in 1980, hence its name, the Nikko Conference on Brain Tumor Research and Therapy. Though it started as a small, closed meeting, the conference has grown considerably, and in 1992 it was reorganized as the Japanese Conference on Brain Tumor Research and Therapy and was opened to all neurosurgeons and neuropathologists interested in the study of brain tumor problems and who are participating in this field. The main purpose of the Conference on Brain Tumor Research and Therapy is the candid and informed discussion of the most up-to-date developments in basic re search and clinical treatment of brain tumors. The 3rd Japanese Conference on Brain Tumor Research and Therapy was held at Nasu (Tochigi Prefecture), Japan, in No vember 1994. It was a great honor to welcome many distinguished guests from over seas who kindly attended each session and made valuable contributions.

The past 20 years have seen a surge of research into colorectal cancer, which is a reflection of the need to improve our methods of treating patients suffering from this increasingly common form of cancer. Greater knowledge of the basic mechanisms involved in colorectal carcinogenesis is an essential prerequisite to improvements in cancer prevention. In this volume the editors have brought together an impressive list of experts to cover the epidemiology, pathophysiology, morphology and basis for new diagnostic and therapeutic approaches to early detection and prevention. This broad scientific approach provides the reader with up-to-date review of our current state of knowl edge of colorectal carcinogenesis and indicates how this information can be used to generate more research and create new opportunities for diagnosis and treatment. This is a book of knowledge and ideas, some of them still at the stage of theoretical interest, but others with practical potential for the care of patients. I recommend it to those who have a research interest in colorectal carcinogenesis, as well as to readers who wish to know just how far medical scientists have progressed in their efforts to achieve the ideal of cancer prevention."

This two-volume work contains the full text of the oral and poster presentations and the general discussion at the round table discussion of the Second International Conference on Alzheimer's and Parkinson's Diseases: Basic and Therapeutic Strategies, held at the Kyoto Park Hotel in Kyoto, Japan, on November 6-10, 1989. The First Conference was held at the Aviya Sonesta Hotel in Eilat, Israel, on March 24-27, 1985. , The record of this First Conference was published by Plenum Press in 1986 as Volume 29 in Advances in Behavioral Biology, under the title "Alzheimer's and Parkinson's Diseases: Strategies for Research and Development." We are happy that the comprehensive texts of the oral and poster presentations of the Second Conference could again be published within the framework of this series. Since the First Conference in 1985, rapid progress has been made in both basic and therapeutic aspects of these diseases. About 700 scientists from allover the world participated in the Second Conference, and 300 papers were presented in oral and poster sessions. Many people and organizations have helped to organize this multi disciplinary international conference and hence have contributed to the scientific quality of these two volumes. We thank the members of the organizing committee, the organizations that provided financial support, and the contributing scientists for their enthusiastic participation.

Autopsy derives from the greek word autopsia, which means act of seeing with one's own eyes. It remains the most objective and accurate method to understand human. disease. Unfortunately, the volume of autopsies in teaching hospitals has decreased dramatically over the past years. The crucial factors that account for this are the recent progress and development of new technologies, especially in diagnostic imaging, immunology, cell biology and genetics. Additionally, the perpetual fear of legal liability by physicians accounts for its further decline. Consequently, physicians and medical students are engaged in fewer autopsies and are not reaping the rich educational rewards that accompany these examinations. The purpose of the autopsy is not only to establish the cause of death, but also to determine the nature and course of the disease process. Our goal with this book is to emphasize the importance of the post-mortem exam and the correlation between pathologic material and clinical data by analyzing actual cases with problem-based methodology. The focus of this handbook is on cardiovascular disease, and when appropriate, other disease categories are included if they have an impact on cardiovascular function. The approach is more than the usual clinico-pathological correlation. Rather, we attempt to present the material from the perspective of the autopsy table. We use the clinical data as the initial framework and the autopsy findings to develop a true understanding of the disease and the associated pathophysiology of the condition.

Capsaicin is a principal pungent ingredient of red chili peppers, first isolated in the early nineteenth century by Christian Friedrich Bucholz. Widely consumed as a spice in South Asia and Latin America, Capsaicin has been used to treat pain and inflammation associated with a variety of diseases, including rheumatoid arthritis, diabetic neuropathy, post-masectomy pain, cluster headaches, and herpes zoster. Although recent studies have evaluated capsaicin as a novel anti-cancer agent, and mechanisms of capsaicin in preventing cancer have been described sporadically, the literature lacks a comprehensive review of capsaicin as a chemo-preventive agent. Role of Capsaicin in Oxidative Stress and Cancer offers a thorough exploration of the preventive and therapeutic effects of capsaicin in cancer models such as melanoma, pancreatic cancer, colon cancer, gastric cancer, breast cancer, prostate cancer, skin cancer, lung cancer, multiple myeloma and glioma. The contributors, all internationally recognized researchers, identify various molecular and cellular targets of capsaicin, and show the critical role of mitochondria in capsaicin-mediated therapeutic effects. Readers will learn how capsaicin prevents or may treat cancer, how different cells respond to capsaicin, how environmental carcinogen-induced carcinogenesis can be prevented by capsaicin and the mechanism of oxidative stress caused by capsaicin. This book will benefit medical students, oncologists and cancer researchers everywhere.

More than ten years have elapsed since the publication of the first edition of Tumors and Tumorlike Lesions of Bone and Joints in 1981. During this period significant progress has been made in diagnosis, and particularly in staging and treatment of bone tumors. In most centers, limb-sparing surgery has replaced the more radical ablative surgery, with or without preoperative chemotherapy. This became possible due to the introduction and increased application of newer high-quality imaging techniques (CT and MRI) and in particular the use of new cytomorphologic methods of diagnosis, especially immunohisto chemistry. These advances in diagnosis and treatment have been reflected by the publication of new editions of several important text books, since their authors - pathologists, orthopedic surgeons, and radiologists - felt the necessity of updating their works in recent years. However, in these publications different criteria of classification were adopted. The number of cases compiled at the Latin American Registry of Bone Pathology increased from 4913 primary bone tumors and more than 1100 tumorlike lesions at the time of publication of the first edition of this book, to 5274 bone tumors and 1665 tumorlike lesions by the end of December 1985, when I finished my work as head of the Registry and occupied the positions of Professor of Orthopedic Pathology at St. Louis University Medical Center and Distinguished Visiting Professor at Rush-Presbyterian-St. Luke's Medical Center in Chicago.

Practicing specialists in pathology, laboratory medicine, and obstetrics comprehensively summarize the latest scientific findings and their experiences in the use and interpretation of laboratory testing in patients who are pregnant or experiencing recurrent pregnancy loss. Topics of interest include the effects of normal physiological changes on test results, test selection for diagnosis, changes in reference ranges, monitoring the pregnant patient, new technologies, and the limitations of laboratory testing. The authors not only clearly explain currently used test methods and technologies for the nontechnical reader, but also provide comprehensive details for laboratory professionals. The comprehensive appendix that compiles published normal reference ranges by first, second, and third trimester consttitutes an excellent resource for professionals caring for pregnant women.

Information analysis centers were developed to help the scientist and practitioner cope with the ever increasing mass of published and unpublished information in a specific field. Their establishment resulted from a further extension of those pressures that had brought about the formation of the specialized primary journal and the abstracting services at the turn of the century. The information analysis center concept was greatly advanced by the 1963 report of the President's Science Advisory Committee Panel on Science Information. This report stated: " . . . scientific interpreters who can collect relevant data, review a field, and distill information in a manner that goes to the heart of a technical situation are more help to the overburdened specialist than is a mere pile of relevant docu ments. " Such specialized information centers are operated in closest possible contact with working scientists in the field. These centers not only furnish information about ongoing research and dis seminate and retrieve information but also create new information and develop new methods of infor mation analysis, synthesis, and dissemination. The continually expanding biomedical literature produced by scientists from the world's laboratories, research centers, and medical centers led the National Institute of Neurological Diseases and Stroke in 1964 to initiate a National Neurological Information Network of specialized centers for neurological information. The Centers are designed to bring under control and to promote ready access to important segments of the literature."

, 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."