Looking for rheumatic disease types, treatments, and associated rheumatology definitions? From abatacept to WOMAC, learn about common terms related to arthritis and rheumatic and musculoskeletal diseases. Looking for information about MACRA? See MACRA terms and definitions.


Hyaluronic acid

Mucopolysaccharide made up of alternating b1,4-linked residues of hylabiuronic acid, forming a gelatinous material in the tissue spaces and acting as a lubricant and shock absorbant generally throughout the body; belongs to disease-modifying antirheumatic drug class of drugs.

Hydroxychloroquine (Plaquenil)

Oral medicine used in the treatment of arthritis to help relieve inflammation, swelling, stiffness, and joint pain and to help control the symptoms of lupus erythematosus (lupus).

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High blood pressure.


Enhanced blood concentrations of uric acid.


Abnormally low levels of calcium in the circulating blood; commonly denotes subnormal concentrations of calcium ions.


Decreased below normal levels of oxygen in inspired gases, arterial blood, or tissue, short of anoxia.

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