AI-powered thumb UCL tear review for skier's thumb, Stener lesion suspicion, avulsion fragments, MCP instability, and ligament discontinuity on MRI or ultrasound.
A thumb UCL tear, often called skier's thumb or gamekeeper's thumb, injures the ligament that stabilizes the inside of the thumb MCP joint. X-rays look for an avulsion fracture and joint alignment. MRI or ultrasound can show whether the ligament is partially torn, completely torn, or displaced superficial to the adductor aponeurosis as a Stener lesion, a pattern that often changes management.
A Stener lesion occurs when the torn thumb UCL is displaced superficial to the adductor aponeurosis, preventing normal healing back to its attachment. MRI and ultrasound can help identify this displacement, but treatment decisions should be made by a hand specialist with the exam findings.
High-quality dynamic ultrasound can be very useful when performed by an experienced operator. MRI provides a broader view of the ligament, bone edema, joint alignment, and associated injuries. The best test depends on local expertise and the clinical question.
A patient-friendly guide to hand and finger X-rays, including alignment, phalanx fractures, metacarpal fractures, arthritis, and avulsion fragments.
Understand thumb UCL tear imaging, skier's thumb, Stener lesion suspicion, avulsion fragments, and when MRI or ultrasound is useful.
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