Nuclear medicine continues to have a major nephro-urological interest. Current areas of progress and interest include: simplified methods of assessing renal function, where there seems to be hope of agreement that single-sample measurements of glomerular filtration rate will be accepted; renovascular disease, where the evidence is now mounting that the captopril stress renogram has a major part to play in patient assessment; obstruction, where the introduction of the F- 15 study represents a major advance; the use of dimercaptosuccinic acid studies in assessment of renal scarring; and nuclear medicine in carcinoma of the prostate.