The present volume constitutes an attempt to compile contem­ porary features of diagnosis and treatment of renal and adrenal tumors. A thorough survey of the field is ensured by the authors' considerable scientific experience. Tumors of the kidneys and the adrenal glands are being diagnosed and treated by physicians of different medical disciplines. For both types of tumor, the pathologic cellular substrate is of crucial importance in diagnosis and therapy. In recent years significant diagnostic advances have been made, ranging from angiography through ultrasonography and computer tomography to immunology. New impulses in oncologic therapy have occurred in surgery, radiation therapy, and tumor emboliza­ tion. A further important topic is renal tumors in infants. Such tumors involve special aspects of both diagnosis and therapy and also have a distinctive prognosis. We are indebted both to Springer-Verlag, who supported us in our intention to write this book, and to our colleagues, whose help is greatly appreciated. For the authors: E. LOHR Essen/Heidelberg, September 1979 Contents (Chapters marked with an asterisk have been translated by H.-U. Eickenberg) Pathology of Renal and Adrenal Neoplasms L.-D. Leder, H.J. Richter, and Chr. Stambolis ...... . 1. Tumors and Tumor-Like Lesions of the Kidney in the Adult 1.1. General Remarks . 1.2. Heterotopic Tissue . . . . l.2.l. Adrenal Tissue . . . . . .