Costal cartilage fracture in blunt thoracic trauma: missed diagnosis with unclear clinical impact

We commend the authors for their multi-institutional review evaluating missed costosternal and costal cartilage fractures in blunt thoracic trauma. This retrospective cohort study of patients admitted to level I and II trauma centers with rib fractures highlights important associations between increased Injury Severity Score, flail segments, sternal fractures, and costal cartilage fractures.¹ While these findings are not unexpected, it is striking that costal cartilage fractures were overlooked on initial imaging in 87% of cases.¹ The critical question remains: does timely diagnosis of these injuries alter clinical management or outcomes?

Costal cartilage fractures are clearly prevalent yet under-recognized in blunt chest wall injury. Over the past decade, surgical stabilization of rib fractures has gained momentum, supported by a growing body of literature defining indications and outcomes.² In contrast, this study underscores the lack of intentional identification and management of costal cartilage fractures. Numerous cartilaginous structures throughout the body warrant repair due to their impact on function and symptoms—raising the question of why costal cartilage should be viewed differently.^{3 4} Existing literature on costal cartilage fractures is limited, consisting primarily of retrospective, single-institution studies. Nonetheless, these studies demonstrate consistent findings, including high rates of missed radiologic diagnosis, predictable fracture location patterns, and correlation with overall injury severity.¹⁴,⁷

Notably, all seven primary investigators are members of the Chest Wall Injury Society (CWIS), and five participating centers are designated CWIS Collaborative Centers. These centers emphasize multidisciplinary engagement in chest wall injury care, including non-surgical specialties. Despite this focus, the high rate of missed diagnoses suggests that costal cartilage injuries are either subtle and difficult to identify or, more likely, not actively sought during radiologic interpretation.^{1 6 7} Greater inclusion and education of radiologists within CWIS initiatives may improve detection, data quality, and broader awareness at trauma centers.

Future prospective, multi-institutional studies are needed to evaluate patient-centered outcomes, symptom burden, and management strategies for costal cartilage fractures. Expansion of established resources such as the CWIS Database may facilitate this work. This study brings needed attention to a neglected injury and provides a foundation for future research and the development of guidance on identification, monitoring, and management of costal cartilage fractures.