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.


Identification and study of the proteins of a cell, tissue, or organism to determine their three-dimensional structure and to map their interactive networks to discover their function and the structure of drugs with the potential to interact in a therapeutic way with disease-associated proteins.


Common multifactorial inherited condition characterized by the eruption of circumscribed, discrete and confluent, reddish silvery-scaled maculopapules. Lesions occur predominantly on the elbows, knees, scalp, and trunk.

Psoriatic arthritis (PsA)

Concurrence of psoriasis and polyarthritis, resembling rheumatoid arthritis but thought to be a specific disease entity, seronegative for rheumatoid factor and often involving the digits.

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Discipline pertaining to psychological and mental testing, and to any quantitative analysis of an individual’s psychological traits or attitudes or mental processes.


Relating to the lungs, to the pulmonary artery, or to the aperture leading from the right ventricle into the pulmonary artery.

Pulmonary arterial hypertension

Hypertension in the pulmonary circuit; may be primary, or secondary to pulmonary or cardiac disease, e.g., fibrosis of the lung or mitral stenosis.

Qualitative research

Designed to reveal a target audience’s range of behavior and the perceptions that drive it with reference to specific topics or issues. It uses in-depth studies of small groups of people to guide and support the construction of hypotheses. The results of qualitative research are descriptive rather than predictive.

Quality of care

The degree to which health services for individuals and populations increase the likelihood of desired health outcomes and are consistent with current professional knowledge.

Quality of life

Patient’s general well-being, including mental status, stress level, sexual function, and self-perceived health status.


Examination of any part of the body for diagnostic purposes by means of x-rays with the record of the findings usually impressed upon a photographic film.

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