Lab-developed blood tests have been used primarily by researchers, or by specialists in large medical centers. The test cleared by the FDA is likely to attract a much broader audience.

We're now closer to being able to diagnose the most common form of dementia with a simple test. The Food and Drug Administration on May 16 said it cleared the first blood test for Alzheimer's disease.

The F.D.A., and Alzheimer’s experts, emphasized that the blood test should be given only to people who are already experiencing cognitive decline and are ages 55 and older.

A blood test has been shown to detect Alzheimer’s disease in health care settings with up to 90% accuracy, as researchers presented at the Alzheimer’s Association International Conference.

If you could take a simple blood test that could detect multiple types of cancer while they’re still in an early and treatable stage, would you? For many, the answer would be a resounding yes ...

To her surprise, the blood test — called Galleri — came back positive. Scans revealed a small tumor in her groin and a diagnosis of mantle cell lymphoma, a rare but aggressive form of cancer.

A new blood test was found to detect colon cancer with more than 80% accuracy — and to rule it out for 90% of healthy people. Doctors speak about how this could improve screening rates and outcomes.

The blood-based test takes advantage of proprietary technology that makes it very sensitive to even low levels of the protein, which could make it a useful tool for screening for the disease.

Overall, a blood test for Alzheimer’s disease, such as the one described in the new study, can be used to help diagnose both a person experiencing early memory loss, as well as before a patient ...

Blood tests can check for infections and high cholesterol, but currently, they can’t test for mental illness or pain. A medical startup called MindX Sciences hopes to change that, and announced ...