Schneble CA, Li DT, Kahan J, et al. - This study was sought to construct the reliability of 2 radiographic union scoring systems for nonoperative humeral shaft fractures. Researchers performed a retrospective medical record review including a total of 45 adult individuals (162 image sets), met the following inclusion criteria: diaphyseal humerus fracture, initial nonoperative management, and greater than 2 weeks of follow-up with imaging. The results considered that the RUST and modified radiographic union scoring systems (mRUST) systems can be applied to humeral shaft fractures with excellent reliability. By providing an objective and standardized method, they have the potential to guide ithe diagnosis of humeral shaft union to evaluate healing of bone over time.