The place and the role of histological examination in diagnostic algorithm of urinary system tuberculosis.

The diagnosis of tuberculosis of renal and urinary tract is made by identifying Koch bacillus in special cultures and using histological examination of surgical removed pieces. Not in all cases the usual pathological techniques are very specific. Using special stain for acid-fast bacilli it can be certified the etiological diagnostic. Histological changes of renal parenchyma and/or upper urinary tract (renal pelvis and urether) structures in 57 patients clinical and paraclinical pyonephrosis diagnosed where studied. All the surgical removed pieces were studied using usual pathology methods. In order to find renal tuberculosis we performed on surgical pieces special staining (Ziehl-Nielsen), we noted the pathological finding in each case and we found 7 cases with certainly tuberculosis etiology.