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Trapeziometacarpal osteoarthritis (TMC OA) is, also known as osteoarthritis at the base of the thumb, thumb carpometacarpal osteoarthritis, basilar (or basal) joint arthritis, or as rhizarthrosis. [ 3 ] [ 1 ] [ 2 ] This joint is formed by the trapezium bone of the wrist and the metacarpal bone of the thumb.
Abnormal growth in joints of the hand often results from chronic disease, such as different forms of arthritis. [20] [21] [22] Rheumatoid nodulosis, which may occur in joint areas, can vary in its effect on hand function. [23] Milder cases often do not disturb daily function, whereas severe ones may induce loss-of-function. [23]
Heberden's nodes are hard or bony swellings that can develop in the distal interphalangeal joints (DIP) (the joints closest to the end of the fingers and toes). [1] They are a sign of osteoarthritis and are caused by formation of osteophytes (calcific spurs) of the articular (joint) cartilage in response to repeated trauma at the joint.
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This includes other types of inflammatory arthritis like RA, psoriatic arthritis, and septic arthritis. Gout can also appear similar to another condition called calcium pyrophosphate deposition ...
They are seen in osteoarthritis, where they are caused by the formation of calcific spurs of the articular (joint) cartilage. Much less commonly, they may be seen in rheumatoid arthritis, where nodes are caused by antibody deposition to the synovium. A Bouchard's node on the proximal interphalangeal joint of the index finger of a 64 year old man.