The most recent experimental work in urology is presented in this volume. Itcontinues the biennial publication of the reports given at the internationalsymposia for experimental urological research; the tenth symposium was held in Munich in June, 1990. The wide range of subjects covers renal cell cancer and adenoma, bladder cancer, urinary diversion, uro- dynamics, renal pathophysiology and transplantation as well as the pathogenesis and treatment of urolithiasis.