This test measures the substances metanephrine and normetanephrine in your blood. It helps find out if you have a tumor of the adrenal glands.

This urine test measures the amount of metanephrines your body makes over a 24-hour period.

This test measures the amount of mercury in your urine. Long-term exposure to mercury can cause kidney and brain damage.

This test measures the amount of mercury in your blood. You can be exposed to mercury from polluted air or water, if you work in an industry that still uses mercury, from eating fish that are high in mercury, and from some complementary and alternative health remedies.

This is a urine test to screen for MDMA, a street drug also known as Ecstasy.

This test measures the amount of magnesium in your blood. Too little or too much of this mineral can mean you have certain health problems.

This test measures the level of luteinizing hormone in your blood. It can help figure out the cause of infertility or diagnose a pituitary disorder.

This is a special blood test to find out if your body is making certain antibodies or proteins that cause you to have a blood-clotting disorder.

This test measures 2 substances found in amniotic fluid near the end of pregnancy. The amounts can tell your healthcare provider how mature your unborn baby's lungs are.

This test measures the level of lipoprotein (a) in your blood. A high level of this cholesterol may mean you have heart disease or another cholesterol-related condition.