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A clinical evaluation of the chemotherapy (INH, PAS and SM) on the 16 patients with renal tuberculosis for the period of 9 months to 4 years was performed. The results obtained were summarized as follows; 1) Of the 16 cases with renal tuberculosis, minimal lesion was found in only one case. moderately advanced in 6, and far advanced in 9. 2) In the case of the minimal lesion, no tubercle bacilli were detected by microscopic examination .after the triple therapy for 3 months. It was suggested that the minimal lesion would require at 1eaet 6 months to be cured by the chemotherapy. 3) Five of the 6 cases with the moderately advanced lesion were cured (83%), and at least 12 months were required for the moderately advanced lesion to be cured. 4) In the 9 cases of the far advanced lesion, only one case was cured, two were on the healing process, three were exacerbated even after the therapy for 6 months, and the remaining three were progressed to those with non-visualizing kidneys 9 to 12 months after the therapy. 5) Five of the 6 exacerbated far advanced lesions were associated with ureteral strictures, and thus the ureteral stricture may be an important factor in determining the prognosis of the renal tuberculosis. For the far advanced lesions progressed to the non-visualizing kidneys in spite of the chemo-therapy, surgical interventions are likely to be more favorable.
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