This test measures the amount of creatine kinase (CK), an enzyme, in your blood. The test can help your doctor find out whether you're having a heart attack.

This test measures the amount of the enzyme creatine kinase in your blood. A certain form of this enzyme can help find out whether you're having a heart attack.

This test may help in the diagnosis of two fairly uncommon medical conditions: Cushing syndrome and Addison disease. The test also screens for other diseases that affect your pituitary and adrenal glands.

This urine test measure the level of the hormone cortisol, which helps your body manage stress.

This test is a screening panel of 14 tests that look at your metabolism. The tests help see how well your liver and kidneys are working.

This test measures the amount of copper-containing protein in the blood. It can help diagnose copper disorders like Wilson disease.

This test looks at the ratio of 2 important types of white blood cells in your blood. If you have HIV, the results can help your health care provider know how strong your immune system is.

This blood test checks for an amino acid called citrulline. It is present when you have rheumatoid arthritis.

This test measures the levels of catecholamines in your urine. The test may help find out if you have a rare type of tumor.

This blood test is used to keep track of breast cancer and to find out whether it might return. It is not a screening test.