MGUS is a non-cancerous blood disorder where abnormal plasma cells produce an unusual protein called M protein (monoclonal protein) in the blood. It affects the same plasma cells involved in myeloma, but at a much lower, non-harmful level.
It's actually quite common — around 2–3% of people over 50 have it, rising to about Show Full Answer
MGUS is a non-cancerous blood disorder where abnormal plasma cells produce an unusual protein called M protein (monoclonal protein) in the blood. It affects the same plasma cells involved in myeloma, but at a much lower, non-harmful level.
It's actually quite common — around 2–3% of people over 50 have it, rising to about 5% in those over 70. Here are some key things to know about MGUS:
- It's not cancer — MGUS is considered benign and rarely causes symptoms
- Low progression risk — only about 1% of people per year see it progress toward myeloma
- Regular monitoring is important — blood and urine tests every 6–12 months help track any changes
- Risk levels vary — doctors classify MGUS as low, intermediate, or high risk, which guides how often monitoring is needed
There is currently no proven way to prevent MGUS from progressing, but researchers are actively studying new treatments to slow or stop that process. MGUS is considered a precursor stage — meaning it can sometimes develop into myeloma, though this is not inevitable. Staying on top of regular check-ins with a doctor is the best way to catch any changes early.
May 10
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