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Editorial Commentary: Magnetic Resonance Imaging Identifies the Comma Sign Seen During Arthroscopy for Subscapularis
The "comma sign" aids arthroscopic identification of torn subscapularis tendons. This MRI finding helps surgeons pinpoint the subscapularis tendon
Area of Science:
- Orthopedic Surgery
- Radiology
- Sports Medicine
Background:
- Subscapularis tears can be challenging to diagnose during arthroscopic surgery.
- The "comma sign" is an arc of the superior glenohumeral/coracohumeral ligament complex.
- This sign aids in identifying retracted subscapularis tears.
Discussion:
- The comma sign is typically visible on preoperative magnetic resonance imaging (MRI).
- MRI characteristics include a low T1 and T2 signal intensity band.
- It is located anterior to the anterior glenoid labrum and lateral to the coracoid base.
Key Insights:
- The comma sign marks the superolateral aspect of a torn subscapularis tendon.
- Preoperative identification of the comma sign improves surgical planning.
- It assists surgeons in locating the leading edge of the subscapularis tendon for repair.
Outlook:
- Enhanced arthroscopic visualization of subscapularis tears.
- Improved surgical outcomes for subscapularis tendon repairs.
- Potential for wider adoption of this diagnostic sign in clinical practice.
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