Foreign body induced metacarpophalangeal joint synovitis
Thorn injury to the dorsal aspect of the 3rd metacarpophalangeal joint region around two weeks ago.
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There is a linear echogenic focus (2 mm length) in the metacarpophalangeal joint on the dorsal side. It abuts metacarpal head.
There is synovial thickening with hypervascularity involving joint in palmer as well as dorsal recess.
There is no tendinosis/tenosynovitis.
There are findings of a foreign body (thorn) in the 3rd metacarpophalangeal joint causing synovitis.