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Ulnar collateral ligament tear / Stener lesion

adpol: aponeurosis of adductor pollicis
ucoll: ulnar collateral ligament

Elderly patient after accident with his bike and contusion of the thumb. the ultrasound reveals a discontinuation of the ulnar collateral ligament at the 1st metacarpal joint with slippage of the torn end of the ulnar collateral ligament superficial to the adductor aponeurosis.