A national study of blood ferritin and hemoglobin levels from tween, teen and young adult females suggests routine screening might be needed for iron deficiency and anemia

Blood donation guidelines based on individual risk rather than broad bans increase the number of people eligible to give and save lives.

Liquid biopsies, a certain type of blood test, can be a helpful tool to guide treatment discussions for patients with metastatic cancer.

Study shows members of public are most likely to want notification if commercial researchers may use identifiable health information – even more than for research on biospecimens.

When a father and his two kids developed an array of peculiar symptoms, doctors, Brazilian researchers and the NIH partnered to find a diagnosis and path to treatment.

A wealth of evidence suggests these tests are often unnecessary, costly, and can lead to adverse effects.

Convalescent plasma has shown promise against COVID-19, but new research will try to prove if it really works.

Vitamin D testing is low value for most patients. A study in the United States and Canada shows the effects of payment vs. Choosing Wisely guidelines to reduce use.

Study finds less invasive tests could still detect serious infections in infants.

A longtime blood test that measures the likelihood of a cardiac event has become more sensitive and more precise. Why doctors and patients should be cautiously optimistic.

Testing for inherited thrombophilia is unnecessary. See why patients won't benefit from inherited thrombophilia testing regardless of if they have had a VTE.

University of Michigan doctors create list of essential medical tests aligning with WHO's essential medicines. Learn more about the medical diagnostic tests.