Glossary of Terms

White blood cells (neutrophils and macrophages) that can ingest and destroy microorganisms, cell debris, and other particles in the...

Patient global assessment (PGA) is one of the most widely used PROs in RA practice and research and is...

Small, purplish, hemorrhagic spots on the skin that appear in patients with platelet deficiencies (thrombocytopenias) and in many febrile...

Pernicious anemia is a condition in which the body can't make enough healthy red blood cells because it doesn't...

Peritonitis is inflammation of the peritoneum — a silk-like membrane that lines your inner abdominal wall and covers the...

Pericarditis is a condition in which the sac-like covering around the heart (pericardium) becomes inflamed. The cause of pericarditis...

Pericardial effusion is the buildup of fluid in the sac. Source: NIH.gov

Peer review is the first stage of our grant decision-making process. All applications received are reviewed by top experts...

The care of children and the treatment of their diseases.

Describes a clinical trial in which two or more groups of participants receive different interventions. For example, a two-arm...

Inflammation of subcutaneous fatty tissue. The most common form of the inflammation is erythema nodosum.

A rheumatological disorder with features suggestive of several kinds of connective tissue disease, but not definitively diagnostic of any...