A Misinterpretable Band on Urine Protein Electrophoresis in Hematuric Patients

Our findings demonstrate that hematuria, particularly when red blood cells undergo lysis, can produce a distinct band in the beta region on urine PEP that may be misinterpreted as a monoclonal protein. Careful correlation with urinalysis results is therefore crucial to prevent misdiagnosis, especially in patients with microscopic hematuria.