A skier falls with the pole in hand and now has instability with valgus stress at the thumb metacarpophalangeal joint. This MOST suggests:

• 1 First carpometacarpal osteoarthritis producing pain with axial grind at the base
• 2 Extensor pollicis longus rupture preventing active retropulsion of the thumb
• 3 Ulnar collateral ligament injury of the thumb ✓ 정답
• 4 Scaphoid fracture producing tenderness in the anatomical snuffbox after the fall

학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요.