Fresh research has opened up new vistas in forensic pathology that are allowing for closer national and international cooperation between pathologists and scientists in a range of medical and scientific disciplines. At the same time, autopsy and laboratory techniques are undergoing rapid evolution, with new procedures coming on stream while existing processes yield additional -- and more accurate -- results. This sixth volume of reviews in forensic pathology provides professionals working in the field with cutting-edge material on the latest key advances in the fields of traumatic death, sudden natural death and death time estimation. Now with numerous color illustrations, the book gives forensic experts across the world a fully up-to-date guide to contemporary procedures and theory in forensic science and medicine. The chapters cover an exhaustive range of aspects in the discipline, from the analysis of sudden natural deaths in infancy and childhood to the cardiac proteomics approach in the study of cases involving sudden cardiac death. Other specialist chapters deal with the forensic investigation of deaths in aviation and as a result of accidents involving all- terrain vehicles. The volume covers fresh research in the use of protein markers for the estimation of post-mortem intervals, and features a chapter telling the story of the medico-legal investigation into the deaths resulting from the 9-11 terrorist attacks on the World Trade Center.Comprehensive and current, this fresh volume of reviews is an essential resource for professionals who need to stay ahead of the game in a fast-moving and exciting field of scientific endeavor.

Hyperthermia as a safe and effective cancer treatment modality is rapidly evolving propelled by widespread research and clinical efforts worldwide. Presentations on Hyperthermia experience are now commonplace at Oncology meetings, as are congresses dedicated entirely to the intertwined interactions between basic sciences and patient treatment that together are forming the structure of a new medical specialty. Such was the XII International Symposium on Clinical Hyperthermia held in Rome, Italy, April 27 - 29, 1989. Papers presented therein constitute the backbone of this book. Biology research has provided data describing mechanisms of action for the cancer cell killing and physiological effects of Hyperthermia. Physics research has led to the development of equipment enabling treatment of many areas of the human body, as well as explained the limitations that still constrain our ability to treat, especially in the areas of deep seated tumor heating and non-invasive thermometry. The main question that will decide the future of this modality is that of its clinical use. To put it succinctly, what do we do with this potentially useful tool in an everyday clinical oncological practice . ** ? This is the main question addressed in this book as "Consensus on Hyperthermia for the 1990s. " The book in cludes 28 presented papers and 25 invited chapters from some of the leading experts in the field. Their basic mechanisms of action were physics principles, treatment quality assurance and especially, clinical indications.

The scope of this book includes several contro apparent instability of viewpoint and nomenclature versial areas and it is impossible to give an account has made many wary. but it is hoped that an under which satisfies everyone. including the author. lying simple basis will allow future changes to be However. the prime objective has been to aid in the easily assimilated. interpretation of histopathological appearances in Detailed accounts of methods of classification lymph nodes. To that end. there is some attempt at are omitted. being widely available elsewhere. nor rationalization whilst admitting that. in rationalizing is there any attempt to be comprehensive. The biological processes. there is a danger of distortion discussion is limited almost exclusively to the and inconsistency. appearances in routine sections. stained with haema Normal structure and function of lymph nodes is toxylin and eosin. with the addition of a few special taken as the backbone from which reactive changes stains. since additional technical methods are not on the one hand. and neoplastic transformation on always available. The limitations that this imposes the other. can be seen to take their origin. Where the are acknowledged. backbone itself is faulty. then there occur distur bances of immunological function. which engender another group of histological changes. Lastly. Acknowledgements essentially systemic disorders may be reflected in I should like to thank: lymph nodes. Mrs Mary Wright who typed the manuscript; the This simple approach can be used to bring order Technical Staff of the Histology Laboratory."

The International Life Sciences Institute (ILSI) was estab lished to stimulate and support scientific research and edu cational programs in nutrition, toxicology, and food safe ty; and to encourage cooperation in these programs among scientists from universities, industry, and government in order to facilitate the resolution of health and safety issues. The officers and trustees of ILSI believe that questions re garding health and safety are best resolved when govern ment and industry rely on scientific investigations, analy ses, and reviews by independent experts. This process is furthered by the examination and discussion of issues on an international basis. ILSI is pleased to sponsor this set of monographs on the pathology of laboratory animals. This project collectively brings together the most comprehensive information on non-neoplastic and neoplastic lesions that occur in com monly used laboratory animals. The international compo sition of the authors, editors, and editorial board who have contributed to these monographs strengthens our expecta tions that understanding and cooperation will be strength ened worldwide through this series."

The European Study Group for Cell Proliferation held its XVth Meet ing at Sundvolden, Norway, in September 1987. The program included a symposium on the cell kinetics of the in flammatory reaction, with invited speakers. This volume of Current Topics in Pathology contains the manuscripts submitted by the speak ers. Inflammation is a very broad area, and the cell kinetics of the inflammatory reaction comprises a large number of topics. A full cover age would fill more than one book. This volume therefore contains only a few of the important aspects of the cell kinetics of the inflammatory reaction. It is hoped that it will serve as inspiration for further research in this important area. Inflammatory diseases are even more important than cancer, and there is a great need for a more detailed information about inflammation. OLAV HILMAR IVERSEN Contents Chapter I The Cell Kinetics of the Inflammatory Reaction. Introduction and Overview."

The third volume and the other two volumes (Volume 1 available, Volume 2 due december 1999) offer the scientific community the works and thoughts of Santiago Ramon y Cajal by the faithful rendition of the original Spanish version of the Texture of the Nervous System of Man and the Vertebrates (1899 1904), with additional facts contained in the French translation (1909 1911). These non-English versions are being quoted an average of 200 times yearly in the scientific literature. The collection will represent the "definitive Cajal to be used by scientists and scholars interested in the original thoughts of probably the most prominent neuroscientist of all times. Unique features of the present work include: Only authorized English translation of the original Spanish text, adhering as much as possible to the letter, with correction of the obvious errors already predicted by Cajal in his Preface. Added facts appearing in the French version, with correction of old as well as new errors, the latter probably due to inaccuracies in translating into French some nuances of the Spanish language. Uniform of nomenclature according to contemporary scientific English. Annotations on Cajal s changing concepts over time, the elucidation of certain structures that do not have present day equivalents, and explanations of the many symbols appearing in illustrations but not mentioned in the corresponding original legends. Most illustrations are reproductions of Cajal s original art work, still extant at the Cajal Museum in Madrid, with cross references to figure numbers of the Spanish and French versions. Citations are given by author and year in the text, with an alphabetical list at the end of the volume, completed and corrected for accuracy against original publications. Taxonomy glossary of species appearing in the text, with present scientific names, and their colloquial English counterparts. In sum, the collection represents the "definitive Cajal to be used by scientists and scholars interested in the original writings of probably the most prominent neuroscientist of all times."

The diagnostic relevance of results, obtained by myocardial biopsy has not yet been defined. This book is the outcome of an international meeting which took place in July 1978 to assess the importance of myocardial biopsy. The meeting was organized under the auspicies of the International Society and Federation of Cardiology, and speak ers from many parts of Europe were invited to report on their ex perience with this new technique. The special aim was to correlate myocardial biopsy results with clinical and hemodynamic data in different myocardial diseases and to outline the relevance of myo cardial biopsy techniques for morphological, morphometric, im munologic and biochemical purposes. Most of the essential parts of the discussions has been included in the text of the contributors. I should like to express my gratitude to Professor J.F. Goodwin, Professor E.GJ. Olsen, and Professor G. Riecker, who acted as chair men and to all the participants of the workshop. I should particu larely like to thank Professor G. Riecker who encouraged the search for new ideas and insight into disease processes. I should like to acknowledge gratefully the generous financial support given by Pharma Schwarz, Monheim, West-Germany. In addition I am particularely grateful to the Springer-Verlag, who has arranged this edition accurately, including special intentions of the editor."

The Nato Advanced Study Institute on Humoral Immunity in Neurological Diseases became possible thanks to the active help of many people. I will not mention our colleagues at the neuroche- mical laboratory of the Born-Bunge Foundation : it was our common job. But I wish to thank : - the Nato and Dr. Kester for their aid, support and gene- rosity, - the Belgian Ministry of Foreign Affairs and Secretary-ge- neral Mr. Grandry for their help and assistance in esta- blishing valuable contacts with many foreign countries, - the Belgian Ministry of Culture for their grant, - the National Fund for Scientific Research and the Belgian Society of Neurology for their financial support. Substantial help came from the Universitaire Instelling Ant- werpen : not only financiall~ but by allowing members of their staff to assist us 'in many ways. The Belgian Friends of the Weizmann Institute and the Belgian Medical Care for Israel helped invite some participants, and many firms made a contribution to our organization. To all of them our warmest thanks.

When presented with the task of editing a volume on such a wide When presented with the task of editing a volume on such a wide and and diverse diverse topic topic as as Ovarian Ovarian Pathology, Pathology, it it is is difficult difficult to to know know how how to to limit limit the the range range of of subjects subjects to to be be covered covered when when there there are are so so many many taxonomical taxonomical entities, entities, both both neoplastic neoplastic and and reactive reactive that that could could be be included. included. However, However, I I have have chosen chosen to to cover cover concepts concepts that that are are not not usually usually dealt dealt with with in in depth depth in in Gynaecological Gynaecological Pathology Pathology textbooks. textbooks. From From the the clinicopathological clinicopathological viewpoint, viewpoint, a a wealth wealth of of new new data data has has been been updated updated and and critically critically reappraised. reappraised.

Progress in science is often promoted by a new method. Diagnostic cytology, however, developed slowly over a whole century, mainly in differentiating malignant from benign cells from various tissues. The decisive step in this development was the intensive investigation of one local ization by Papanicolaou: The application of cytology for screening in the field of gynecologic oncology made it an acknowledged technique. Consequently, materials inves tigated before were tested again on a larger scale and new ones were included into the program. The possibility of a wide-range application of this diag nostic method, which carries a low risk for the patient and is low in cost, attracted the specialists of many fields. One of the problems which has resulted is the coordination of training and quality assurance for a large group of people from different fields and with different interests and whose experience in morphology varies. In this volume general problems of cytology are dis cussed, as is the question "who is a medical cytologist?" Education and training are the topics of the contributions by Coleman, Holzner, Jenny, Koss and Muller, cover ing the situation in the European Community, Germany, Austria, Switzerland, and the USA. A special contribu tion by Lange concerns the situation of cytotechnologists, paramedicals important for cytologic screening programs.

Battle is a practical and sometimes lasting way of solving man's problems. It relies on the strength of the combatants and ignores the truth of the dispute. Discussion face to face can dissolve attitudes which have incorrectly determined judgements. The most striking example of this that I know is a Battle in Ireland in the eleventh century, where the king of Leinster fought a Viking prince. The Icelanders had raided Ireland for several generations in search of women, which they lacked since most of the population of Iceland were men who had arrived there by rowing long-boats from Norway. The prince was leading such a raid for the first time. Standing in the prow of the leading boat he saw Irish cavalry galloping along the beach to meet them. As they approached the shore the Irish king rode out of the band to challenge single combat. The Icelander jumped into the surf to meet him. As they raised their swords each realized that the other's face was like his own. When the Irish king spoke the other recognized the language. It had been spoken in Iceland by his grandmother who had been captured and taken there from Ireland. Swords were dropped and replaced by drinking horns. It was soon established that they were cousins. The battle gave way to a life-time of close co-operation.

The classification of tumors is important for understanding tumor histogenesis, for predicting prognosis, for differential diagnosis, and for recommending appropriate therapy. Since 1836, when pancreatic cancer was first described, progress has been made in pancreatic cancer morphology, and a number of classifications have been proposed. All of these classifications are mainly based on morphological characteristics. Some are too detailed to be of practical use while others are more pragmatic. Some of the inherent problems in the previous classifications included difficulties in obtaining an adequate number of pan creatic tumors for examination and insufficient clinical data and follow-up. With the increasing incidence of pancreatic cancer in many parts of the world during the past six decades, and with the availability of more tumors to patho logists, advances have been made in pancreatic tumor studies. Classifications by Cubilla and Fitzgerald and by Kloppel, which are generally similar, mostly considered prominent morphological features and their histogenesis. These pathology-oriented classifications, although complete, were not practical from the standpoint of clinicians concerned with the prognosis of individual tumors."

When it comes to bacterial disease, we are living in a state of false security. Antibiotics have indeed brought unprecedented health benefits, protection from and cure of bacterial diseases during the past 50 years. But there are ominous signs that the fortress and the defenses built on antibiotics are crumbling. They are crum bling because we wittingly or unwittingly created selective con ditions for the emergence of superior pathogens that can no longer be controlled by antibiotics. There are numerous warnings. After a long period of eclipse tuberculosis has now emerged as a serious threat unchecked by antibiotic treatment. Recent years have seen reports of cholera epidemics, of anthrax infections, of serious problems with Salmonella and even with E. coli, just to name a few. Mankind is in a race with microbial invaders. The challenge is to anticipate and respond to developments that affect the precarious balance between man and microbe. This will re quire new knowledge and it will take time for an effective appli cation of that knowledge."

This volume is based on a workshop "Modulation of Synaptic Transmission and Plasticity in Nervous Systems" held in n Ciocco, Castelvecchio, Pascoli, Italy, from September 8th to 13th, 1987. The purpose of the meeting was to bring together scientists working on plasticity in nervous systems on different levels. The contributions can be subgrouped into six fields of research: 1) Presynaptic Modulation of Chemical Neurotransmission 2) Postsynaptic Signal Transduction 3) Modulation of Synaptic Transmission and Plasticity in the Hippocampus 4) Modulation of Neuromuscular Transmission 5) Molecular and Cellular Analysis of Conditioning in Marine Snails 6) Analysis of Learning and Memory in Insects Understanding how nervous systems and in particular our brain processes and stores information has been a major challenge in science for centuries and will remain for some time to come. Not until recently neurobiologists agreed to seek plasticity of behavior primarily in the modulation of the properties of synapses between nerve cells. This is to be understood within the context provided by a neural circuitry. An important stimulus came from the work on the marine snail Aplysia, where learning processes can be described as a modulation of transmitter release, traced back to a complete chain of molecular events in an identified neuron. Learning became a topic of molecular biology. Three systems appear particularly promising for this approach: insects, in particular Drosophila, marine snails and the mammalian hippocampal tissue. Our views on neurotransmission have rapidly changed.

J. Oort and J. P. A. Baak This manual is written by pathologists and is meant for pathologists. It deals with a subject that became especially popular in pathology at the end of the last decade: morphometry. Morphometry is defined as the quantitative description of a structure (Weibel, 1969). This structure may be both of macroscopic and micro- scopic size. Strictly, the size of an organ is a morphometric feature. This type of morphometry has long been in use in pathology. Examples ofthis type in diagnostic pathology have been given by Roesle and Roulet (1932). In this manual, however, the term morphometry is used in its re- stricted microscopic meaning, i.e., the quantitative description of micro- scopic images and features. The quantitative analysis of microscopic pic- tures has for a long time been subordinated to the qualitative description. This may partly have been caused by the preference of the human mirld for pattern recognition rather than quantitative appraisal, which leads to judgements based on impressions subconsciously tested against the ob- server's (mental) image of the normal pattern. Another cause may have been the time-consuming difficulties of collecting and computing quanti- tative information. During the past decades the usefulness of quantitative methods in histo- and cytopathology has been stressed for many different subjects. In addition, minicomputers have become widely available and are becoming increasingly inexpensive; the more so since the introduction of micro com- puters.

The third American edition has been completely revised and expanded, although parts of the text of the second edition have been included. I wish to acknowledge once again the excellent translation of the former two editions by Dr. ALAN B. ROTHBALLER and the late Dr. JERZY OLSZEWSKI. With this edition I have followed the general theme of the original German edition published in 1951. However, I have tried to consider modern techniques and the many new publications on the subject of brain tumors. Meanwhile, an early desire of mine has been fulfilled by the completion and publication of a classification which can be understood worldwide and hopefully be used widely, namely, the classi fication of the World Health Organization: Histological Typing of Tu mours of the Central Nervous System (1979). The classification which I used in the 1951 edition is very close to the final pattern of that accepted by the World Health Organization (WHO), since both follow the line of the BAILEY and CUSHING classifica tion of 1926/1930. To consolidate our old concepts and experiences we have reclassi fied our collection of 9000 cases with the assistance of my co-workers Dr. M. FUKUI, Dr. A. SATO. Dr. E. SCHARRER, Dr. E. SIMON, and Dr. J. SZYMAS. In the last decade two large atlases have been published, one called an Atlas of the Histology of Brain Tumors 1 (in six languages) and a second one called an Atlas of the Gross Neurosurgical Pathology 2."

Advances in breast cancer research, achieved through the progress of knowledge and development of new therapies, have been translated into improved quality of care for breast cancer patients. Clinical investigations and clinical trials have made the largest contribution to the body of knowledge that finds its way to the patient. Never before during the past decades of management of breast cancer has there been such a fruitful intellectual cross-fertilization of ideas among individuals involved in the generation of hypotheses, basic research, development of drugs and treatments, conduct of clinical trials, and statistical evaluation - the results of all of which are now translated into progress in clinical care. Even issues such as the quality of life of breast cancer patients, once the domain for few, are now being openly addressed by trials and discussed in a much broader forum. The IVth International Conference on the Adjuvant Therapy of Primary Breast Cancer, also known as the st. Gallen Conference, was again attended by more than 800 scientists and clinicians interested in this broad spectrum of breast cancer research and the interactions between such diverse fields of interest and specialties as cancer pathology, molecular biology, and psychosocial oncology. This volume collects findings and conclusions presented at the conference.

In this book, precursors of gastric cancer are described histopathologically, especially about the precancerous conditons and precancerous lesions of the stomach. In addition to those precancerous changes stated in previous monographs and textbooks, some newly recognized gastric dysplasias are proposed. In order to be able to ovjectively evaluate the atypism of dysplasic changes, achievements of morphometric studies were presented.

Antibodies tagged with fuorescent markers have been used in histochemistry for over 50 years. Although early applications were focused on the detection of microbial antigens in tissues, the use of immunocytochemical methods now has spread to include the det- tion of a wide array of antigens including proteins, carbohydrates, and lipids from virtually any organism. Today, immunohistochemistry is widely used to identify, in situ, various components of cells and tissues in both normal and pathological conditions. The method gains its strength from the extremely sensitive interaction of a specifc antibody with its antigen. For some scientifc areas, books have been published on applications of immu- cytochemical techniques specifc to that area. What distinguished Immunocytochemical Methods and Protocols from earlier books when it was frst published was its broad appeal to investigators across all disciplines, including those in both research and clinical settings. The methods and protocols p- sented in the frst edition were designed to be general in their application; the accompa- ing "Notes" provided the reader with invaluable assistance in adapting or troubleshooting the protocols. These strengths continued to hold true for the second edition and again for the third edition. Since the publication of the frst edition, the application of immuno- tochemical techniques in the clinical laboratory has continued to rise and this third edition provides methods that are applicable to basic research as well as to the clinical laboratory.

During the past ten years numerous new findings have been documented in the field of gynecological pathology, especially in respect of neoplasms. These findings have been generated by the application of recently developed techniques of immunology and molecular biology. However, clinicopathologic examinations. are still an absolute requirement for the morphologic evaluation of neoplasms, including gynecological tumors. The International Society of Gynecological Pathologists (ISGYP) has contributed greatly to the progress within gynecological pathology. The ISGYP Nomenclature Committee has promoted the International Histological Classification of Gynecological Tumors under the auspices of the W orid Health Organization. A new edition of the classification of tumors and tumor-like conditions of trophoblastic disease, uterine corpus, cervix, vagina, and vulva is currently in press. A second volume covering the ovaries, fallopian tubes, broad ligament, and female peritoneum will be published later. Organization of scientific symposia and seminars has also been an important activity of the ISGYP. The present editor organized and chaired a symposium entitled "Recent Progress in Diagnostic Pathology of Gynecological Tumors" held in Sendai, Japan on 11 April 1986 in close cooperation with Prof. T. Okagaki, University of Minnesota Medical School, and under the joint auspices ofthe ISGYP and the Japanese Society of Pathology. The following topics were discussed at this symposium: - Immunocytochemistry of gestational trophoblastic disease (Dr. R.J."

possibly neoplastic, some not. In essence, the Often enough, in diagnosing cancer the last word rests with the pathologist and his or her micro book is concerned with interpretation of the scope. Often enough, too, the pathologist is borderline or histologically equivocal case and thought to dispense absolute truth: he does his the clinical implications thereof. It is based on best, but the truth he dispenses is not absolute. so me 390 examples of which most are individu Rather, with a greater or lesser degree of con ally described in brief. No useful purpose is fidence, he is making aprediction or expressing served by giving in detail the clinical and patho a prob ability of a certain kind of biological logical circumstances of every patient with, say, behaviour, and the degree of confidence with a dubious lesion of endometrium or larynx, or which he operates is based on experience. This with a similarly borderline papilloma in bladder experience is, in turn, based on the recollection or rectum, for each of these lesions exemplifies of earlier events, counsel from his mentors, from a familiar and 'standard' problem. Problems of his studies, and from discussions with colleagues. this kind will be examined as such but not the It would be going too far to agree with those details of every patient who posed them."

When 1 first developed an interest in the pathology of bone 1 found that there were relatively few books on the subject available. Much of my information had either to be obtained from searching the journals or from senior colleagues in the field, who, 1 should add, were always more than willing to teach me. With this memory in mind, 1 have endeavoured to produce a book which 1 hope is of a convenient size and yet will hold sufficient information to be of use mainly to the pathologist faced with a bone problem. This is not intended to be an all-embracing source of knowledge on the subject; indeed, such a task could not be undertaken by a single author in these days of the rapid increase in information even in small subspecialist areas within bone pathology. Although this book is written mainly for the pathologist, it is hoped that it may also be of interest and value to orthopaedic surgeons, rheumatolog ists and radiologists. Most of the illustrations are original and many of the drawings are my own. There has been a long tradition of interest in bone pathology at The London Hospital, which has resulted in a wealth of material being available to me from the archives of the Department of Morbid Anatomy. A few of the photo graphs are those of Prof. H. Turnbull; the observant reader will detect these, since the scales used are not metric."

Offering a systematic comparative approach to Western and Eastern medicine, this unique textbook enables students and practitioners of Chinese medicine to develop a core understanding of conventional medical language and treatments. Acupuncture practitioners increasingly find themselves working alongside Western healthcare professionals. Now in its second edition, this book is a guide to conventional medical diagnoses, symptoms and treatments, and using examples drawn from the author's experience and knowledge of TCM it encourages reflection on how these diagnoses may be interpreted from a more holistic medical perspective. It includes introductory sections on physiology, pathology and pharmacology, chapters devoted to the physiological systems of the body and the conventional approach to the treatment of diseases that can affect them, and information on dealing with patients in practice. Accompanying online material, including self-testing questions and answers and checklists for revision, is available for those wishing to use the text for systematic study.

In 1967 cardiologists in Switzerland were struck by the sudden increase in the number of cases of so-called primary pulmonary hypertensive disease (PPHD). Up untill966, the cardiology centers in Switzerland had not seen more than one or two cases a year, but this number suddenly multiplied by ten or twenty times. At the June 1968 meeting ofthe Swiss Society of Cardiology, Gurtner et al. (1968b) presented a paper which raised the question whether the vascular types of cor pulmonale had increased. They also raised the question about the possible responsibility of environmental factors, such as toxins or drugs, in causing this increase. Krrihenbuhl et al. (1968) first suggested the possible responsibility of anorexigenic drugs, but no proof was provided. Soon after this, the cardiology team in Bem (Gurtner et al., 1968a) published their report, which resumed and completed the above-mentioned prelim inary communication; 31 cases of PPHD, among which 17 had taken an anorexigenic drug, aminorex fumarate (Menocil, Cilag), were reported. The importance of this work was soon recognized and it was followed by several meetings (in Vienna, Hannover, and Burgenstock) and two round tables sponsored by the Swiss Society of Cardiology (in Montreux and Basel)."

We would like to take this opportunity of expressing our sincerest thanks to the many persons who have made adrenal tissue and related materials available to us for our work. Our especial gratitude is extended to Drs. J. J. Brown, A. Lever and J. I. S. Robertson of the M.R.C. Blood Pressure Unit, Glasgow, Dr. J. K. Grant, Royal Infirmary, Glasgow, Professor R. B. Welbourn and Dr. W. Kelly, Royal Postgraduate Medical School, Drs. D. B. Grant of Great Ormond Street, J. Ginsberg, Royal Free Hospital, D. C. Anderson, Hope Hospital, Salford, C. R. Edwards, St. Bartholomew's Hospital and Professor I. Doniach (for merly of the London Hospital) and Messrs. J.-c. Gazet, A. McKinna and P. Greening, Royal Marsden Hospital, London. The preparation and presentation of the material and the results would not have been possible without the help of Dr. P. Monaghan and his Electron Microscopy Unit, Ludwig Institute for Cancer Research (London Branch), Sutton, Mrs. Mitchell and her Histology Team, Royal Marsden Hospital, Sutton, Mr. K. Moreman of the Photographic Department of the Royal Marsden Hospital and Institute of Cancer Research, London and Mr. M. Hughes for graphics. Particular thanks are due for the untiring efforts and assistance ofMr. J. Ellis and Mrs. D. Corney of the Ludwig Institute for Cancer Research (London Branch), Sutton, for most of the photographic and secretarial work respectively. Professors G. Dhom and E. Mausle kindly provided material for Figs."