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Review Question - QID 219944

QID 219944 (Type "219944" in App Search)
A 50-year-old laborer presents to the orthopedic clinic for his first postoperative appointment after undergoing a right elbow arthroscopic debridement and capsular release for post-traumatic arthritis and stiffness. Ten years prior, the patient underwent radial head operative fixation and lateral collateral ligament (LCL) repair through a posterior skin incision. In the clinic today, he reports weakness in the right hand since the elbow arthroscopy. Which exam finding below is most suggestive of an iatrogenic injury that could have occurred during placement of the anterolateral portal?