Most people with lupus have antinuclear antibodies (ANAs) in their blood. But a positive ANA test doesn’t always mean lupus. The test can be positive in people with other autoimmune illnesses — ...

Controversy has erupted among researchers over an effort to adopt blood tests and brain scans for diagnosing Alzheimer’s disease, rather than the cognitive screening that has been used for decades.

Nirav Shah, principal director of the U.S. Centers for Disease Control and Prevention. The new guidance comes after blood tests for 115 farmworkers in Michigan and Colorado showed that eight workers — ...

A first-of-its-kind blood test that uses biomarkers to distinguish bipolar disorder from depression could slash the time it takes to get an accurate diagnosis from years to weeks, according to the ...

A blood test is now available to screen for colorectal cancer. However, a recent study concluded that the test shouldn't replace traditional screening methods, such as colonoscopy or stool tests.