Return to Sport After Nonoperative Management of Elbow Ulnar Collateral Ligament Injuries: A Systematic Review and Meta-analysis.

When a throwing or overhead athlete injures the ulnar collateral ligament in the elbow, surgery is well studied, but what happens with nonoperative treatment has been less clear. This systematic review pooled 15 studies covering 365 athletes, most treated with either physical therapy alone or physical therapy combined with platelet-rich plasma injections, to see how often athletes returned to sport and to their previous level of play without surgery. Overall, about 80% returned to sport and roughly 78% returned to their prior level of play, with better outcomes for lower-grade injuries and for tears located closer to the ligament's origin rather than near its attachment further down the arm. Adding platelet-rich plasma injections did not show a statistically significant difference in return-to-sport rates compared with physical therapy alone.

The main limitation is that this evidence comes from a small, varied collection of lower-level studies, not controlled trials directly comparing treatments head to head.

If you or someone you know has injured the ulnar collateral ligament in the elbow, often from throwing sports, this review looked at what happens when the injury is treated without surgery, usually with physical therapy and sometimes with platelet-rich plasma injections. Researchers combined findings from 15 smaller studies involving 365 athletes to get a broader picture. Overall, about 8 in 10 athletes were able to return to their sport, and a similar proportion got back to their previous level of play.

Athletes with milder injuries did better than those with more severe ones, and those with tears in one part of the ligament had noticeably better return rates than those with tears in another part. Adding platelet-rich plasma injections to physical therapy did not show a clear advantage over physical therapy alone in this analysis. It's worth keeping in mind that this comes from a collection of smaller, less rigorous studies rather than large controlled trials, so the confidence in these numbers is limited.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

For clinicians managing overhead athletes with ulnar collateral ligament injuries, this review addresses a genuinely uncertain question: how reliably do these athletes return to sport with nonoperative management, and does adding platelet-rich plasma to physical therapy improve that outcome? The pooled analysis of 15 studies and 365 patients found an overall return-to-sport rate of 79.7% and return-to-previous-level-of-play rate of 77.9%, with clearly better outcomes in grade 1 and grade 2 injuries specifically. The most clinically relevant subgroup finding was the difference by tear location: proximal tears returned to sport at 89.7% (61 of 68) versus 41.2% (14 of 34) for distal tears, a statistically significant difference (P less than .0001). This distinction may be useful when discussing prognosis, though it comes from subgroup data within a heterogeneous evidence base rather than a controlled comparison.

Notably, comparing platelet-rich plasma plus physical therapy (189 patients, 7 studies) against physical therapy alone (176 patients, 8 studies) showed no statistically significant difference in return-to-sport rate (P = .757), meaning this review does not establish added benefit from the injection. The included studies are level 1 to 4 evidence, and the review itself is level 4, so pooling does not convert these individually modest studies into high-certainty evidence; heterogeneity in injury grading, treatment protocols, and follow-up should temper how confidently these rates are applied to individual patients.