Abstract

NDAMASE, S  and  FREERCKS, R. The utility of urine sulphosalicylic acid testing in the detection of non-albumin proteinuria. SAMJ, S. Afr. med. j. [online]. 2015, vol.105, n.2, pp.153-153. ISSN 2078-5135.  https://doi.org/10.7196/samj.9270.

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.

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