International Myeloma Working Group (IMWG) Criteria for the Diagnosis of Multiple Myeloma

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The updated criteria for the diagnosis of myeloma represent a paradigm shift in the approach to myeloma and have considerable impact on the management of the disease. For decades the diagnosis of multiple myeloma required the presence of end-organ damage known as the CRAB criteria, including increased calcium level, renal dysfunction, anemia, and destructive bone lesions. The updated criteria allow for treatment of patients who are at such high risk of progression to symptomatic disease that it is clear they would benefit from therapy—and also potentially live longer—if they were treated before serious organ damage occurred. The revised IMWG criteria allow, in addition to the classic CRAB features, three “myeloma defining […]