Constricted Access to the Subscapularis Recess in Association with Sublabral Foramen and Variations of the Middle Glenohumeral Ligament: MR Imaging Study with Cadaveric Correlation (original) (raw)

Abstract

PURPOSE To determine the association of a sublabral foramen with constricted distension of the subscapularis (SSc) recess and the presence of a thick and/or high riding middle glenohumeral ligament (MGHL). METHOD AND MATERIALS Fifty-eight cases of sublabral foramina on conventional or arthrographic MR imaging were retrospectively collected searching our computer data base. The studies were reviewed for the presence of constricted fluid distension of the SSc recess and a thick and/or high riding MGHL, using the biceps as an internal size standard. The following findings were recorded: 1) thick MGHL; 2) high riding MGHL and/or conjoined origin with the superior glenohumeral ligament (SGHL); 3) complex fluid signal/loose bodies within the SSc recess and 4) fluid volume of the constricted SSc recess. Cadaveric correlation of the SSc recess anatomy was performed using MR arthrography with band saw correlation. RESULTS Ten out of 58 were excluded due to previous surgery and/or technically...

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