Multiple myeloma diagnostic criteria

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Hannan Javed, M.D.[2] Associate Editor(s)-in-Chief: Serge Korjian M.D. Shyam Patel [3]

Overview

The diagnosis of monoclonal gammopathy of undetermined significance requires the presence of clonal plasma cells < 10% and serum monoclonal protein <3g/dl but the absence of end-organ damage. The diagnosis of smoldering multiple myeloma requires the presence of clonal plasma cells 10%-60% and serum monoclonal protein >3g/dl but the absence of end-organ damage. The diagnosis of active multiple myeloma requires the presence of end-organ damage. In November 2014, the International Myeloma Working Group (IMWG) updated the criteria for the diagnosis of multiple myeloma to include novel validated biomarkers to better encompass the extent of disease. Prior to 2014, the original diagnostic criteria for end-organ damage included CRAB features (hypercalcemia, renal failure, anemia, and bone lesions) without consideration of the plasma cell burden or free light chain ratio. The 2014 update also clarified the underlying laboratory and radiographic findings of CRAB features, as well as the histological and monoclonal protein requirements for the disease diagnosis.[1]

Diagnostic Criteria

Revised Criteria for the Diagnosis of Multiple Myeloma

The diagnosis of multiple myeloma requires the following:[1]

OR

With one or more of the CRAB features and myeloma-defining events:

Revised Criteria for the Diagnosis of Multiple Myeloma

OR

With one or more of the following:

Criteria for the Diagnosis of Monoclonal Gammopathy of Undetermined Significance (MGUS)

All three criteria must be met:

Criteria for the Diagnosis of Smoldering Multiple Myeloma

Both criteria must be met[1]:

References

  1. 1.0 1.1 1.2 Rajkumar, S. Vincent, Meletios A. Dimopoulos, Antonio Palumbo, Joan Blade, Giampaolo Merlini, María-Victoria Mateos, Shaji Kumar et al. "International Myeloma Working Group updated criteria for the diagnosis of multiple myeloma." The Lancet Oncology 15, no. 12 (2014): e538-e548

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