What is the pathophysiology of monoclonal gammopathy of undetermined significance (MGUS)?

Updated: Dec 29, 2019
  • Author: Suzanne R Fanning, DO; Chief Editor: Emmanuel C Besa, MD  more...
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The reason for the monoclonal expansion of a single Ig-secreting plasma cell population in what appears to be a nonmalignant manner is unknown in most cases. Most cases involve IgG or IgA monoclonal cell populations. About 15-20% are composed of IgM monoclonal cells.

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