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Clinical application of a rapid technique for urinary electrophoresis in multiple myeloma.

Proteinuria in three cases of multiple myeloma was studied without prior concentration of the urine, using a simple technique of urinary protein electrophoresis. In each case a free light chain spike was observed in association with a glomerular, tubular or normal urine protein electrophoresis pattem. The suggestion is made that this simple procedure may become a screening test for investigation of renal diseases.