ABSTRACT
Erosive osteoarthritis (EOA) is a progressive disorder affecting the interphalangeal
joints of the hands. Severe synovitis is superimposed on the typical changes seen
in conventional interphalangeal osteoarthritis (OA), which includes formation of Heberden's
and Bouchard's nodes. Imaging studies show a combination of bony proliferation (osteophytosis),
periosteal reaction, and articular erosions, which assume "gull-wing" configuration.
Differential diagnosis includes classic "degenerative" OA, rheumatoid arthritis, and
psoriatic arthritis.
KEYWORDS
Erosive osteoarthritis - osteoarthritis - articular erosions - hand