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The utility of urine sulphosalicylic acid testing in the detection of non-albumin proteinuria
Abstract
We report two cases of immunoglobulin light chain proteinuria (Bence Jones proteinuria) detected by simple side-room investigations: urine dipstick negative/1+, but with strong positive precipitation on addition of an equal volume of sulphosalicylic acid (SSA) 3%. We highlight a significant limitation of urine dipstick testing, namely specificity for albumin, and the utility of SSA testing for the detection of urinary free light chain immunoglobulins.
Authors' affiliations
S Ndamase, Division of Nephrology and Hypertension, Department of Medicine, Faculty of Health Sciences, University of Cape Town, and Renal Unit, Livingstone Hospital, Port Elizabeth, South Africa
R Freercks, Division of Nephrology and Hypertension, Department of Medicine, Faculty of Health Sciences, University of Cape Town, and Renal Unit, Livingstone Hospital, Port Elizabeth, South Africa
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Date published: 2014-12-16
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