Ulnar collateral ligament tear - thumb
Persistent left thumb pain after an injury 4 weeks ago.
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Localized echo-poor area equals 2.6 x 1.2 millimeter seen at distal attachment of the left thumb ulnar collateral ligament, likely represents a partial thickness tear at the proximal phalangeal attachment site.
Partial thickness tear of the left thumb ulnar collateral ligament is seen as a hypoechoic area towards the distal attachment of the ligament at the 1st proximal phalanx. No calcifications or bony avulsions seen.