Glenoid Retroversion
Pronunciation: GLEE-noid RET-roh-ver-zhun
Abnormal posterior angulation of the glenoid fossa, often associated with posterior shoulder instability in athletes.
Full Definition
Glenoid retroversion refers to excessive posterior angulation or tilting of the glenoid fossa relative to the scapular body. This anatomical variation can be developmental or acquired through repetitive stress, particularly common in overhead athletes such as baseball pitchers and tennis players. Normal glenoid version ranges from slight anteversion to minimal retroversion, but pathological retroversion (typically >10 degrees) predisposes athletes to posterior shoulder instability and internal impingement. The condition is often identified through advanced imaging including CT or MRI, and understanding glenoid version is crucial for surgical planning in cases of recurrent shoulder instability.
Usage
Usage note: Often measured in degrees on cross-sectional imaging. Normal values vary by measurement technique and population studied.
In Context
- "CT arthrography demonstrated significant glenoid retroversion of 15 degrees, explaining the recurrent posterior instability episodes." — Imaging report
- "Surgical correction of glenoid retroversion may be considered in athletes with refractory posterior instability." — Surgical consultation note