The Urinary Sediment in Hydronephrosis

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Abstract
Phase contrast microscopy was used for examination of urinary sediments from 19 patients with hydronephrosis. Casts were seldom seen. An increased number of erythrocytes was seen only in association with catheter, calculi or diabetes. An increased number of leukocytes was seen in patients with bacteriuria. A striking observation was the finding of a great proportion (64%) of histiocyte-like cells in 6 out of 12 cases in whom a differential count was performed. The proportion of histiocyte-like cells was small (14%) in cases with bacteriuria or history of urinary tract infection.