Beta-2 Microglobulin (B2) Urine Test
Beta-2 Microglobulin (B2) Urine Test (Labcorp)
This test measures the level of Beta-2 Microglobulin in the urine. B2 Microglobulin is a protein found on the surface of many types of cells in the body. Normally, only trace amounts of B2 microglobulin are found in the urine as most of it is absorbed by the kidneys. B2 levels typically rise when kidney function is impaired. Measuring B2 levels can help evaluate what type of kidney dysfunction a person has as well as determine how well they are responding to treatment.
Elevated B2 levels are also associated with certain types of cancers such as Multiple Myeloma and Lymphoma. Other conditions such as HIV or Cytomegalovirus may also increase B2-Microglobulin levels. B2 is sometimes used as a tumor marker. While it is not used as a screening, measuring B2 levels can help assess the severity of a person's cancer. It is also used in some cases to measure how effective someone's treatment has been.
B2-Microglobulin testing is typically ordered when someone has symptoms of kidney dysfunction or to monitor treatment for kidney failure. A Blood B2-Microglobulin test is often ordered along with a urine test. It may also be ordered after a person has been diagnosed with cancer such as Multiple Myeloma to determine what stage of the disease they are in.
Turnaround for this test is typically 3-5 business days.
Where can I find a Beta-2 Microglobulin test near me?
Check our lab finder to locate a collection site in your area.
Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.
To collect the sample for this test:
2. Drink a large glass of water
3. Collect a sample at the lab within an hour