S52.21

A greenstick fracture of the shaft of the ulna is a type of incomplete fracture commonly seen in pediatric patients, characterized by a bending of the bone without complete disruption. This fracture occurs when the bone bends and cracks on one side while remaining intact on the other, resembling the way a green twig breaks. The ulna, one of the two long bones in the forearm, can sustain this type of fracture due to trauma, falls, or direct impact. Clinically, patients may present with localized pain, swelling, and limited range of motion in the affected arm. Diagnosis is typically confirmed through radiographic imaging, which reveals the characteristic incomplete fracture pattern. Treatment often involves immobilization with a cast or splint, and in some cases, orthopedic intervention may be necessary to ensure proper alignment and healing. Complications can include malunion or nonunion, particularly if the fracture is not adequately stabilized. Understanding the nuances of this fracture type is crucial for accurate coding and management, especially in pediatric populations where growth plate involvement may also be a concern.