β2-Microglobulin, Blood and Urine
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General
Synonym/Acronym:
β2-M, BMG.
Common Use:
To assist in diagnosing malignancy such as lymphoma, leukemia, or multiple myeloma. Also valuable in assessing for chronic severe inflammatory and kidney diseases.
Specimen:
Serum collected in a red- or red/gray-top tube or urine from a timed collection in a clean plastic container with 1 N NaOH as a preservative. Urine from an unpreserved random collection may also be requested.
Normal Findings:
(Method: Immunochemiluminometric assay)
| Sample | Conventional & SI Units |
|---|---|
| Serum | |
| Newborn–1 mo | 1.6–4.8 mg/L |
| 2–6 mo | 1–3.8 mg/L |
| 7–11 mo | 0.9–3.1 mg/L |
| 1–6 yr | 0.6–2.4 mg/L |
| 7–18 yr | 0.7–2 mg/L |
| Adult | 0.6–2.4 mg/L |
| Urine | 0–300 mcg/L |
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