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A histopathologic study of the renal tissue obtained by percutaneous needle biopsy was carried out in 35 subjects suffering from active pulmonary tuberculosis. 24 (68.5%) of them had proteinuria and 18 (51.5%) oedema. There was no evidence of renal tuberculosis. Four subjects (11.4%) exhibited tissue amyloidosis and it was associated with massive proteinuria and hypercholesterolaemia. Non-specific change in the form of cloudy swelling was frequent (20%). The renal involvement in some form or other was noted in 16 (45.7%) cases. Twelve subjects with proteinuria exhibited normal histology. Generally the renal lesions in pulmonary tuberculosis pursue a subclinical course and in majority they remain asymptomatic.