The subscapularis muscle: A meta‐analysis of its variations, prevalence, and anatomy

Abstract

Background: The subscapularis (SSC) is the largest rotator cuff muscle and is involved in the medial rotation, abduction, adduction, and anterior stabilization of the shoulder. It is anatomically variable, as is the morphology and prevalence of the accessory SSC (aSSC), a rare muscle slip attached to the SSC. There is no current review investigating the prevalence and morphometrics of the SSC and aSSC.Purpose: To investigate the prevalence of the morphological variants of the SSC and aSSC via meta-analysis and review the relevant literature involving cadaveric, magnetic resonance imaging, and ultrasonographic studies.

Subdeltoid Lipoma Associated With Subscapularis Tear Successfully Treated With Arthroscopic Resection and Cuff Repair: A Case Report

“…The subscapularis muscle is the largest and strongest of the rotator cuff muscles and is responsible for the internal rotation of the shoulder joint [ 15 ]. Subscapularis tears are less common than supraspinatus tears but can occur due to trauma or degenerative changes associated with subcoracoid impingement [ 1 ].…”