Supraspinatus tear is indicated by the posterior sentinel sign of the biceps tendon

Key Points

• This research aims to evaluate the posterior sentinel sign as a diagnostic indicator for supraspinatus tears.
• Utilized magnetic resonance imaging (MRI) for accuracy assessment.
• Investigation of long head of biceps tendon (LHBT) instability and its relevance to cuff tears.
• Exploration of the posterior sentinel sign in relation to supraspinatus tears.
• MRI shows high accuracy in diagnosing full-thickness rotator cuff tears.
• Posterior sentinel sign identified as a new arthroscopic indicator for supraspinatus tears.
• Findings suggest potential improvements in diagnosing small anterosuperior cuff tears.