All::Haematology::Diseases::Monoclonal gammopathy of undetermined significance (MGUS)

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What is Monoclonal gammopathy of undetermined significance?

a common condition that causes a paraproteinaemia and is often mistaken for myeloma

Monoclonal gammopathy of undetermined significance (MGUS)

What are the main clinical features of Monoclonal gammopathy of undetermined significance?

  • usually asymptomatic
  • no bone pain or increased risk of infections
  • around 10-30% of patients have a demyelinating neuropathy

Monoclonal gammopathy of undetermined significance (MGUS)

How to differentiate MGUS from myoloma?

  • normal immune function
  • normal beta-2 microglobulin levels
  • lower level of paraproteinaemia than myeloma (e.g. < 30g/l IgG, or < 20g/l IgA)
  • stable level of paraproteinaemia
  • no clinical features of myeloma (e.g. lytic lesions on x-rays or renal disease)

Monoclonal gammopathy of undetermined significance (MGUS)