Our understanding of the pathogenesis of renal diseases and the ability to accurately classify and diagnose them has improved considerably over the last two decades. Until now, however, this information has not been available in a single, up-to-date and succinct yet comprehensive source. The publication at hand aims at filling this gap, condensing a vast amount of information into easily accessible chapters. After a discussion of basic concepts and principles of renal tissue reactions to injurious agents using a specific cell/compartment approach, a multitude of disorders are looked at, including renal interstitial fibrosis, glomerulosclerosis, various forms of glomerulonephritis and nephropathy, amyloidosis and renal Fanconi syndrome. Some of the chapters address controversial subjects, reporting the current situation and showing areas of future potential research interest. At the end of many of the contributions, a summary is provided, often in the form of a chart to facilitate the understanding of the information and to make it most useful for didactic purposes. This book is intended for students of various disciplines, as well as clinicians and investigators and all those trying to correlate basic research information with clinical issues.