Suspicious bands in serum and urine protein immunofixation electrophoresis tests in patients with and without a history of monoclonal gammopathies: a retrospective database study
Clarifying what weak protein bands actually mean reduces unnecessary follow-up anxiety and focuses monitoring on patients who truly need it.
In a 6-year follow-up of 1,289 electrophoresis tests, none of the 30 patients initially reported as suspicious-for-monoclonal-band (SfMB) developed overt monoclonal gammopathy, suggesting SfMB is an overworked category. The authors propose nomenclature reform ('weak positive') to better contextualize findings in patients with known gammopathies.
What the study was
- Study design
- Retrospective database study
- Population
- Patients with electrophoresis tests in 2019 (n=1289 total; 30 SfMB, 357 with prior monoclonal gammopathy)
- Sample size
- 1289
- Category
- Diagnostics
- Maturity
- Exploratory
- Journal
- Laboratory Medicine
Why it surfaced
Clinically useful diagnostic clarification for monoclonal gammopathy workup; limited novelty; small SfMB cohort (n=30); actionable nomenclature recommendation.
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