Lipoprotein (a) is a low-density lipoprotein that transports cholesterol in the blood. The lipoprotein (a) test — or Lp(a) test — determines the level of this lipoprotein in the blood, and its results ...

The mystery of dark matter—unseen, pervasive, and essential in standard cosmology—has loomed over physics for decades. In new research, I explore a different possibility: Rather than postulating new ...

B cells are a subtype of lymphocyte. They form part of the adaptive immune response and mediate humoral immunity. B cells can produce high-affinity antibodies and generate immunological memory. Aging ...

Testing for meningitis may include a physical exam, blood tests, bacterial cultures, imaging, and a spinal tap for cerebrospinal fluid testing to confirm the diagnosis. Seek emergency care for severe ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

Monoclonal B-cell lymphocytosis (MBL) is when you have a high number of identical B cells, under 5,000 per microliter, for at least 3 months. It usually causes no symptoms or need for active treatment ...