Characteristics and Therapy of Jersey Finger Type V Injuries at a Middle-European Level 1 Trauma Center—A Retrospective Data Analysis

<b>Background/Objectives</b>: Reports on type V FDP tendon avulsions and their treatment are rare. Furthermore, they are not always classified in a consistent manner in the literature. The purpose of our retrospective data analysis was to evaluate and present jersey finger type V injury characteristics, primary radiological findings, treatment options and subsequent patient outcomes, as well as potential complications. <b>Methods</b>: We reviewed all patients treated for a fracture of the distal phalanx at an academic Level 1 trauma center over a period of 19 years. By reviewing the patients' charts and their initial X-rays, we identified 44 patients with injuries matching the criteria for classification as jersey finger type Va and type Vb. All clinical records and radiologic images were reviewed to gather data on the mechanism of trauma, injury characteristics, type of treatment and subsequent outcomes in both subtypes. <b>Results</b>: Direct blows represented the most common mechanism of trauma, accounting for 23 cases. Among 44 jersey finger type V injuries, 31 showed minor displacement and were treated conservatively with a good outcome. Six patients undergoing surgery showed a poor outcome, except for one. <b>Conclusions</b>: Jersey finger type V differs considerably from the remaining types of jersey finger injuries regarding the predominant trauma mechanism. Therefore, its inclusion in this classification should be reevaluated. Established surgical techniques for refixation did not show a satisfying outcome, thus the implementation of alternative surgical techniques seems advisable when better therapeutic results are sought.