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 […]

International Myeloma Working Group updated criteria for the diagnosis of multiple myeloma

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This International Myeloma Working Group consensus updates the disease defi nition of multiple myeloma to include validated biomarkers in addition to existing requirements of attributable CRAB features (hypercalcaemia, renal failure, anaemia, and bone lesions). These changes are based on the identifi cation of biomarkers associated with near inevitable development of CRAB features in patients who would otherwise be regarded as having smouldering multiple myeloma. A delay in application of the label of multiple myeloma and postponement of therapy could be detrimental to these patients. In addition to this change, we clarify and update the underlying laboratory and radiographic variables that fulfi l the criteria for the presence of myeloma-defi ning CRAB features, and the histological and monoclonal […]

IMWG Guidelines on Imaging Techniques in the Diagnosis and Monitoring of Multiple Myeloma

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Up to 90% of myeloma patients develop osteolytic lesions, a major cause of morbidity and mortality, during the course of their disease. 2  Appropriate use of imaging techniques is essential to identify and characterize skeletal complications resulting from MM, to determine the extent of intramedullary and extramedullary foci, and to evaluate disease progression. Several imaging techniques are used to clarify bone and soft tissue disease in the diagnosis and management of myeloma: conventional radiography, computed tomography (CT), magnetic resonance imaging (MRI), and nuclear medicine imaging. The following International Myeloma Working Group (IMWG) guidelines provide recommendations for the use of each of the technologies. The appropriate use of these various technologies […]