Thumb Injuries
A 32-year-old man presents to the emergency department after a skiing accident. He fell onto his outstretched hand with the ski pole strap forcing his left thumb into radial deviation. He has swelling and bruising over the ulnar aspect of the thumb MCP joint. On examination, there is tenderness over the ulnar collateral ligament (UCL) and stress testing reveals 40 degrees of radial deviation with no firm endpoint (compared to 15 degrees on the uninjured side). Radiographs show no fracture. Regarding thumb UCL injuries (gamekeeper's/skier's thumb):
Mark each as TRUE or FALSE
The mechanism is FORCED ABDUCTION (radial deviation) of the thumb, causing injury to the ULNAR COLLA...
STRESS TESTING: compare to uninjured side; greater than 30 degrees of radial deviation on valgus str...
The STENER LESION occurs when the proximal UCL remains deep to the adductor aponeurosis after injury...
The STENER LESION occurs when the RUPTURED UCL DISPLACES SUPERFICIAL to (on top of) the adductor pol...
IMAGING: radiographs may show an avulsion fracture from the base of the proximal phalanx (UCL attach...
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Click T (True) or F (False) for each option