Posterior Labral Tear Extension Concomitant with Shoulder Bankart Injuries Is Not Uncommon

June 3, 2022

Several orthopaedic experts, including UPMC Orthopaedic Care physicians Mark Rodosky, MD, Bryson Lesniak, MD, and Albert Lin, MD, recently published a study in Arthroscopy, Sports Medicine, and Rehabilitation.

The purpose of this study was to identify the rate and risk factors of posterior labral involvement in operatively managed Bankart lesions and assess the effectiveness of MRI arthrogram for preoperative identification of such injury patterns.

A consecutive cohort of patients undergoing arthroscopic Bankart repair were retrospectively reviewed. All subjects underwent a pre-arthroscopy MRI arthrogram. Operative findings were used as the gold standard for posterior labral tear extension. Patient demographic and surgical data were then analyzed to identify independent factors associated with the presence of concomitant posterior labral injury.

Of 124 patients undergoing arthroscopic Bankart stabilization, 23 (19%) were noted to demonstrate posterior labral injury on arthroscopic evaluation. Factors associated with injury to the posterior labrum included those sustaining two or fewer dislocations events, an earlier average presentation, and a reported "contact" mechanism of dislocation. Posterior labral involvement did not correlate with surgical positioning (beach-chair versus lateral) or the need for revision surgery. On the basis of review of preoperative imaging, MRI arthrogram demonstrated a sensitivity of 83% and a specificity of 95% for detection of posterior labral injury.

Posterior propagation of Bankart lesions is relatively common following shoulder dislocations, with a rate of 18.5%. Risk factors for posterior labral extension include two or fewer dislocations, early presentation from the time of injury, and contact sports. On the basis of these findings, careful assessment of the posterior labrum on MRI arthrogram may reveal the majority, but not all, of these lesions.

Read the full study.

Other study authors include:

  • Gillian Kane

Collaborators not affiliated with the University of Pittsburgh:

Elan Golan, MD
Northside Hospital

Akere Atte, MD
Broward Health

Mauricio Drummond, MD
UConn Health Center

Ryan Li, MD
Wake Orthopaedics