In a patient diagnosed with Multiple Myeloma, is there a role for 24-hour UPEP prior to treatment?  

I’d do a random UPEP first. If no light chains or renal dysfunction, I would not do 24-hour test. If light chains present with renal dysfunction, or significant protein on UA (albumin), I may do 24-hour UPEP and protein quantitation to distinguish myeloma kidney from light chains vs nephrotic ...