Waldenstrom=s - 4
•Laboratory Findings:
•epresence of M-protein on serum electrophoresis
•eserum & urine characterization of M-protein using:
•Žimmunofixation test (IFE) - one of choice
•Žimmunoelectrophoresis test (IEP)
•equantification of serum IgM levels using:
•Žnephelometry procedures
•eM-protein of Waldenstrom=s may be:
•Žin serum:
•wIgM heavy chains
•weither kappa or lambda light chains
•Žin urine:
•weither kappa or lambda light chains
•wfree light chains are called   ABence-Jones proteins@