Urine Bence Jones protein
What this test measures
Bence Jones protein is a fragment of antibody (a free light chain) passed in the urine. It is looked for when a plasma cell condition such as myeloma is being considered.
Why doctors request it
Requested alongside serum electrophoresis and free light chains when unexplained anaemia, bone pain, kidney problems or a high calcium raise the question of myeloma.
What commonly pushes it up
- Myeloma and related plasma cell conditions
- Occasionally other conditions that produce abnormal antibodies
What commonly pushes it down
- A negative result is the usual finding
Everyday reasons for a value outside the range
- Low-level positives occur in the general population and are read with the clinical picture
- Thresholds differ between laboratories
About the sample
No fasting needed.
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Read my report freeThis is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.