Thumb trauma - 2 wks. Plain radiograph - No fracture. Referred for ulnar collateral ligament evaluation by ultrasound.
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There is loss of continuity of ulnar collateral ligament of thumb at its distal attachment site. Controlled stress view shows widening of joint space. Ruptured ligament is deep to adductor aponeurosis. There is no associated bony avulsion.
Comparision with asymptomatic side is done; which shows intact ligament.
Ultrasound findinds favor rupture of ulnar collateral ligament of thumb without Stener lesion.