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Updated 28 July 2008

All of these must be present:​

  • Serum monoclonal paraprotein
  • No lytic bone lesions
  • Bone marrow plasma cell proportion less than 10%

Usually the paraprotein type is IgG or IgA and the level is less than 30 g/L and the levels of the uninvolved immunoglobulins are normal, however, in up to 25% of cases of MGUS one or more of the uninvolved immunoglobulins may be below normal.​

SOURCE: Diagnosis ( )
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