A chronic systemic disease, primarily of the joints, marked by inflammatory changes in the synovial membranes and articular structures, widespread fibrinoid degeneration of the collagen fibers in mesenchymal tissues, and by atrophy and rarefaction of bony structures. Etiology is unknown, but autoimmune mechanisms have been implicated.
Rheumatoid Arthritis
D013704
Temporomandibular Joint
An articulation between the condyle of the mandible and the articular tubercle of the temporal bone.