Distal biceps short head tears: repair, reconstruction, and systematic review.

Background: Isolated short head tears of the distal biceps are uncommon and often underappreciated. The aim of this study was to describe the presenting features and management of acute and chronic short head ruptures treated at our unit and in the published literature.

Methods: Six short head ruptures in 5 patients are described. The clinical and radiographic findings, operative techniques, and postoperative outcomes are reported for all patients. A systematic review of the existing literature was also performed.

Results: All patients presented with pain and weakness following an acute traumatic event. One patient presented with bilateral tears 3 years apart. Four of the ruptures underwent acute repair. Two ruptures presented chronically with retracted short head tears and were treated with allograft reconstruction of the short head. Preoperative magnetic resonance imaging findings demonstrated retraction of the short head affecting only 1 muscle belly, and in all patients the hook test was intact. All patients reported excellent functional outcome scores with no postoperative complications. The systematic review identified 9 previously reported cases, of which 8 were treated surgically with a successful outcome. Detailed analysis of these cases demonstrated clinical findings consistent with our cases, and these are outlined in depth in the article.

Discussion/conclusions: Isolated short head ruptures are a rare and distinct form of distal biceps tear that present with consistent clinical findings that can aid in diagnosis. They present acutely, have a poor natural history akin to complete tears, and have good outcomes with acute and delayed reconstruction.