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.



Lesion through the skin or a mucous membrane resulting from loss of tissue, usually with inflammation.


Location, measurement, or delineation of deep structures by measuring the reflection or transmission of high frequency or ultrasonic waves; computer calculation of the distance to the sound-reflecting or absorbing surface plus the known orientation of the sound beam gives a two-dimensional image.


Inflammation of the uveal tract: iris, ciliary body, and choroid.

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