Extensor carpi ulnaris tenosynovitis
Local non-resolving swelling. History of thorn injury to ulnar aspect of wrist / distal forearm - 15 days back. USG to look for ECU and any foreign body.
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Global thickening with effusion is noted at sheath of extensor carpi ulnaris ( ECU ) tendon. Local hypervascularity also is present. There is normal fibrillar pattern at ECU tendon and no evidence of intratendinus hypoechoic areas /tears. Foreign body could not be localized.
The ultrasonography findings are compatible with extensor carpi ulnaris tenosynovitis.