General information, not an individual diagnosis. Ask a healthcare professional if you are unsure about your situation.
Monoclonal gammopathy of undetermined significance, or MGUS, is diagnosed after medical assessment. Finding a monoclonal immunoglobulin in the blood does not on its own establish a diagnosis of myeloma. Ask for the exact terms in your report to be explained.
Plasma cells make antibodies. In myeloma, abnormal tumour plasma cells multiply in the bone marrow. MGUS is a distinct condition that may remain stable or progress: assessment looks for signs of organ involvement before follow-up is defined.
Confirmed MGUS does not warrant haematological treatment targeting the plasma cell clone; monitoring appropriate to risk is organised instead. Not receiving this treatment therefore does not mean the result is ignored or that follow-up is unnecessary.
Monitoring combines clinical assessment and blood tests chosen by the doctor, including electrophoresis, a blood count and kidney function tests. To compare electrophoresis over time, HAS recommends using the same technique in the same laboratory. Keep complete, dated results.
Check frequency depends on the assessment and your circumstances. Have your next check and the professional who will explain its results recorded. New bone pain, worsening general health or abnormal tests may call for earlier reassessment: do not save these concerns solely for the scheduled appointment.
At follow-up, ask what is being compared: the amount of monoclonal protein, other results and symptoms. The doctor decides whether further advice or imaging is useful; these are not automatic. A single number does not allow you to change the monitoring programme yourself.
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