I. Yaghmai

Six years ago the editors of the Encyclopedia of Medical Radiology selected two additional editors from the emerging generation of young radiologists to complete this unique compendium of radiology. Klaus Ranniger was one of them and he worked with enthusiasm and great energy at the challenge facing him. His editorial work was excellent and he succeeded in winning internationally acclaimed scientists to contribute to this volume. Their chapters have met the requirements and goals we set out to achieve in every aspect and to the highest degree. The majority of the authors valued Klaus Ranniger not only as a fellow scientist and doctor but also as a personal friend. In America, his adopted country, he found acknowledgement of his personal achievement and scientific research. He was highly respected and admired among specialists in the field of radiology. Klaus Ranniger, our coeditor and friend, died suddenly and unexpectedly before this volume could be published. We are honored to present this volume as his legacy. FRIEDRICH HEUCK Vorwort Die Herausgeber des Handbuches der medizinischen Radiologie nahmen vor sechs Jahren aus der nachfolgenden Generation von Radiologen zwei Mitarbeiter in ihren Kreis auf, urn dieses im wissenschaftlichen Schrifttum der Welt einmalige Sammelwerk der Radiologie aus dem Springer-Verlag zum AbschluB zu bringen. Mit groBer Tatkraft und echter Begeisterung hat Klaus RANNIGER die ihm gestellten Aufgaben tibernommen.

Many bone lesions have a characteristic roentgen appearance, while others create diagnostic dilemmas not only for the radiologist, but also for the pathologist and surgeon. Arteriography is helpful in the diagnosis of these difficult cases, which cannot be diagnosed with certainty by the combined data from plain radiographs and histologic material. Since therapy is depen­ dent on the specific diagnosis, and unnecessary radical surgery has been performed in the past for benign disease, the addition of arteriographic data may confirm or refute a diagnosis and be quite helpful to the patient and orthopedic surgeon. Issa Yaghmai has had a great interest in the angiography of bone lesions and has collected over 650 cases during the past 10 years. He has examined patients with virtually every type of bone lesion, and has faithfully cat­ alogued and recorded his findings along with those of the pathologist. The histologically doubtful cases were sent to other renowned bone patholo­ gists for opinions so that he could be as accurate as possible in correlating his angiographic findings with specific histologic diagnoses. His collection of bone arteriograms is surely one of the most extensive in the world. He has recorded in this volume the illustrations and information he has amassed, and supplemented it with pertinent information from an exhaustive review of the literature. Bone angiography is not for every patient with a bone lesion, and Issa carefully tells us when it will or will not help us in our differential diagnosis.