Skier's Thumb (UCL Tear)

Stener lesion is critical to diagnose because it requires surgery. Clinical Suspicion: significant thumb instability on stress testing, >35° opening compared to opposite thumb, pain with stress testing, complete tear suspected clinically, inability to pinch normally. Definitive Diagnosis: MRI (gold standard, shows ligament position), ultrasound (dynamic assessment, growing role), direct examination during surgery confirms. What is a Stener Lesion: Adductor aponeurosis trapped between torn UCL and bone, physical barrier preventing healing, cannot heal without surgical intervention, present in 14-29% of complete tears. Why It Matters: Conservative treatment will fail, chronic instability develops, functional disability results, surgery becomes essential, earlier surgery better than late repair. What to Do: Get proper imaging (MRI), see hand surgeon, don't accept "just a sprain" without evaluation, surgery if Stener lesion confirmed.

Depends on severity and presence of Stener lesion. Yes, Conservative Treatment Works For: Grade 1 sprains (mild), some Grade 2 partial tears, complete tears WITHOUT Stener lesion, patient preference in selected cases, lower demand patients. Surgery Generally Needed For: Stener lesion present (absolute indication), complete tears in athletes, significant instability, failed conservative treatment, patient preference for definitive treatment. Conservative Treatment Approach: Thumb spica cast/splint 4-6 weeks, strict immobilization, hand therapy after, gradual return to activity, possible long-term bracing. The Critical Distinction: MRI helps determine severity grade, presence of Stener lesion, surgical vs conservative path, treatment plan. Don't Skip Imaging: A "thumb sprain" missed as complete tear with Stener lesion leads to chronic problems and need for delayed surgery with worse outcomes.

Most people recover well with proper treatment. With Appropriate Treatment: Most return to full function, pinch strength restored, stability achieved, sports return possible, long-term outcomes good. Factors Affecting Outcome: Severity of original injury, time to proper diagnosis, quality of treatment, compliance with rehabilitation, activity demands. Surgery Outcomes: 85-95% good results, restoration of stability, return to pinch grip, sport participation possible, long-term excellent. Conservative Treatment Outcomes: Good for appropriate cases, may have some chronic stiffness, most return to function, bracing may help, less successful for complete tears. Long-Term Considerations: Some residual stiffness common, arthritis risk in joint, activity modifications sometimes needed, brace use for high-risk activities, continued exercises helpful.