There is seen reduced joint space, marginal lipping, anterior osteophytes formation, subchondral cystic changes and thinning of articular cartilage involving first carpometacarpal joint suggest degenerative osteoarthritic changes.
Mild-to-moderate joint effusion with synovial thickening is noted involving first carpometacarpal joint suggest chronic degenerative synovitis.
Coronal GRE image shows thinning and distal retraction of the anterior oblique ligament (AOL) (larger pink arrow) and coronal STIR image shows the development of volar synovial recess (green arrow) due to stripping off of AOL.
There is seen dorso-radial subluxation of the base of the first metacarpal with thickening of dorsal ligament complex (smaller pink arrow).