Foreign body induced tenosynovitis of tibialis anterior
C/o penetrating injury by thorn to anterior ankle - 1 mth. C/o local pain and swelling.
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5 mm long x 1 mm thick echogenic linear focus is noted embedded in thickened synovium of intact tibialis anterior tendon sheath. Mild fluid is noted in sheath. Local hypervascularity is noted.
Findings favour tibialis anterior tenosynovitis due to foreign body - thorn.