This paper analysed the renograms in 107 cases of renal tuberculosis. In 100 cases of which x-ray examination were done

and in 82 cases the diagnosis was confirmed during operation and by pathological examination. Renograms were repeated in 20 cases after nephrectomy. The renograms showed abnoimal findings in all of the 107 cases

with unilateral abnormality in 44 cases and bilateral in 63 cases. Amony the latter

the findings of the renograms were of the same type on both sides only in 1 case and of different types in another 62 cases; in about 2/3 of these cases

there was excretory impairment of varying degree on the side with milder changes

and in approximately 1/3 of them

there was also impairment of renal function.In 15 cases had undergone nephrectomy

the renograms of the contralateral kidney were normal or slightly abnormal before operation

and remained so or recovered after nephrectomy. The above results showed that the changes in renograms were strongly correlated with the pathological findings of the tuberculous kidneys and were quite useful for the te diagnosis of renal tuberculosis and for the prognosis after nephrectomy.