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Updated: Sep 21, 2025

The Modified Single-working Portal Technique Using Lasso-loop Stitch with Needle for Arthroscopic Subscapularis Repair
Published on: August 8, 2025
The Arthroscopic "Bellows" Sign Identifies Hidden Rotator Cuff Tears
Matthew G Fanelli1, Larry D Field1
1Mississippi Sports Medicine and Orthopaedic Center, Jackson, Mississippi, U.S.A.
Abstract:
The intraoperative recognition of rotator cuff tears continues to be a challenge in some cases, despite clinical suspicion, a physical examination suggesting a rotator cuff tear, and detection on preoperative imaging studies. Intraoperative identification can be elusive in partial tears including intratendinous tears and obscured full-thickness tears. The purpose of this Technical Note, and the associated technique video, is to discuss a visual sign for the detection of various rotator cuff tear pathologies. Derived from the dynamic fluid expansion and contraction of the affected tissues, this indicator is termed the arthroscopic "bellows" sign.
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