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<p>Posterior shoulder instability (PSI) is rare, accounting for 2–10% of all glenohumeral instabilities, and primarily affects young, physically active patients. Etiologically, traumatic, chronic-repetitive, and atraumatic-habitual forms are distinguished. Clinically, load-dependent posterior shoulder pain predominates, while a&#xa0;subjective feeling of instability is rarely reported. The Jerk and Kim tests are diagnostically decisive, demonstrating high sensitivity and specificity for posteroinferior labral lesions; the modified O’Brien test can provide additional insight. The Stanmore and ABC classifications categorize PSI according to etiology and structural lesions, supporting treatment planning. Imaging diagnostics include radiographs to exclude major structural changes, CT to analyze bony factors such as glenoid retroversion, dysplasia, or bone defects, and MRI to detect typical posterior labral, capsular, and cartilage lesions.</p>

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Posteriore Schulterinstabilität

  • 期刊论文

  • 发表日期：

    2026年2月13日

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  • Paul Siegert,
  • Victor Szenes,
  • Andrea Estfeller,
  • Valentin Hingsamer

摘要

Posterior shoulder instability (PSI) is rare, accounting for 2–10% of all glenohumeral instabilities, and primarily affects young, physically active patients. Etiologically, traumatic, chronic-repetitive, and atraumatic-habitual forms are distinguished. Clinically, load-dependent posterior shoulder pain predominates, while a subjective feeling of instability is rarely reported. The Jerk and Kim tests are diagnostically decisive, demonstrating high sensitivity and specificity for posteroinferior labral lesions; the modified O’Brien test can provide additional insight. The Stanmore and ABC classifications categorize PSI according to etiology and structural lesions, supporting treatment planning. Imaging diagnostics include radiographs to exclude major structural changes, CT to analyze bony factors such as glenoid retroversion, dysplasia, or bone defects, and MRI to detect typical posterior labral, capsular, and cartilage lesions.