A Comparison of Biceps Labrum Complex Findings in Patients With and Without Superior Migration of the Humeral Head in Large or Massive Rotator Cuff Tears

Abstract

Background: The purpose of this study was to clarify the relationship between superior migration of the humeral head and findings of biceps labrum complex (BLC) in large or massive rotator cuff tears. Methods: Forty-nine shoulders that underwent surgery for torn supraspinatus and infraspinatus tendons were included. Patients were divided into two groups according to the acromio–humeral interval (AHI). Arthroscopic findings of BLC were classified into five types; Type 0; normal shape, Type 1: fraying; Type 2: detachment; Type 3: attrition of BLC and superior glenoid; and Type 4: defect. Results: The group without migration (AHI ≥ 7 mm) consisted of 21 shoulders and that with migration (AHI < 7 mm) was 28 shoulders. There were significantly more patients with Types 2, 3, and 4 in the group with migration than without migration. Conclusion: This study indicates a potential relationship between BLC injury and superior humeral head migration accompanied by a rotator cuff tear.

Keywords

• arthroscopic findings
• biceps labrum complex
• rotator cuff tear
• superior migration of humeral head