Glomerulonephritis has always been regarded as a complex subject. Different forms o f the disease c a n cause death in a matter o f weeks, nephrotic syndrome which might or might not prove responsive to steroid therapy, or no symptoms a t all. Improved pathological te- niques and criteria have permitted a more accurate diagnosis and prognosis to be established for many patients. With increased und- standing of the immunological mechanisms involved it has become apparent that many patients presenting with a variety of symptoms and signs m a y have glomerulonephritis as their primary pathological process. This book examines the clinical, pathological and aetiological factors involved in the common forms o f glomerulonephritis. Each chapter has been written by a recognized expert in the field and provides information of relevance and practical importance to the average clinician. The developments of the last decade have emp- sized that glomerulonephritis is no longer a matter only for the nephrologist but a subject o n which all clinicians should be well informed.