Foreign body - thumb
Penetrating injury to dorsum of thumb at MCP joint area by thorn - 5 days. C/o local pain. USG to locate or rule out foreign body.
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Linear echogenic focus is noted in region of interest - Foreign body.
Length - 3 mm.
Plane - subcutenous plane
It is superficial to tendon.
Deep to two subcutaneous non-thrombosed veins.
Depth from skin - 3 mm .
Direction - along long axis of tendon.
Surroundging hypoechoic granulation is noted.
Mild effusion is noted in 1st carpo-metacarpal joint.
Pre Surgical ultrasound helps to confirm and localize foreign body.
Exploration - thorn at a site mentioned by ultrasound.