PMC

a Intraoperative photo reveals tear UCL anterior bundle and split in the flexor/pronator mass. b The UCL tear has been repaired and unitized to flexor/pronator mass using a nonabsorbable suture in a Krakow fashion

a Intraoperative image demonstrating insertion of internal brace composed of suture material using a suture anchor. b Final internal brace augmentation. The UCL repair lies under the internal brace augmentation

Cadaveric model demonstrating the anterior bundle of the medial ulnar collateral ligament. This ligament serves as the primary restraint to valgus stress across the ulnohumeral joint

Complete, mid-substance tear of the ulnar collateral ligament in a professional baseball player. This injury was not amenable to nonreconstruction options and a reconstruction with palmaris autograft was performed. After 12 months, he made a full return to pitching in Major League Baseball

Partial, high-grade ulnar collateral ligament injury in a professional baseball pitcher. He was treated with platelet rich plasma injection, rest and physical therapy. After 8 weeks, he made a full return to pitching in Major League Baseball

Acute distal ulnar collateral ligament avulsion in a 17-year-old female gymnast. This patient was a junior in high school and was not planning on continuing with gymnastics beyond the high school level. She was treated with an acute repair and was able to return to gymnastics at 6 months and complete her senior season