The use of potent coagulation factor concentrates has dramatically changed the clinical picture and the life expectancy of haemophiliacs. The aim of well-organized care of haemophiliacs is to prevent not only life-threatening bleeding episodes, but also the development of disabling arthropathies. In spite of numerous effective drugs and the beneficial effect of early synovectomy, haemophilic arthropathy will long remain a crux of everyday practice. Based on 10 years' experience at the National Institute of Haematology and Blood Transfusion, this volume presents a detailed description of the X-ray morphology of haemophilic arthropathy. The rich series of illustrations should serve for guidance in diagnostics and differential diagnostics, and will provide help in establishing the stage and in estimating the prognosis. It will be of interest to all physicians engaged in the care of haemophiliacs. Susan R. Hollan, M. D. Corresponding Member of the Hungarian Academy of Sciences, Professor of Haematology. Director of the National Institute of Haematology and Blood Transfusion 9 Acknowledgements I gratefully acknowledge the help of all those who have contributed to this mono­ graph. First I wish to acknowledge the help of Professor Susan Hollan, Corre­ sponding Member of the Hungarian Academy of Sciences, Director of the National Institute of Haematology and Blood Transfusion, Professor of Haematology at the Postgraduate Medical School, Editor-in-chief of Haemat%gia, an internation­ al quarterly, who provided us with the most modern equipment and has been interested in, and encouraged, our work throughout.