RSNA 2013 

Abstract Archives of the RSNA, 2013


RC404C

MR of Glenohumeral Ligaments and Biceps Labral Complex

Refresher/Informatics

Presented on December 3, 2013
Presented as part of RC404: Current Imaging of the Shoulder: Rotator Cuff and Glenohumeral Joint Instability including Normal Variants, Pitfalls, Controversies, and Postoperative Challenges

Participants

David Wayne Stoller MD, Presenter: Nothing to Disclose

LEARNING OBJECTIVES

1) To understand and identify the relationship of the inferior glenohumeral ligament, and the anterior band attachment variants. 2) The role of the superior glenohumeral ligament relevant to the biceps pulley and its relationship to the CHL ligament. 3) Biceps labral complex will be defined and discussed with Type I-III. 4) BLC sulcus will be defined. 5) SLAP tear pattern recognition and subtypes 1-10 will be reviewed. 6) Relevance of ABER review and MR arthrography.

ABSTRACT

The anterior glenoid labrum provides the major area of attachment for the anterior band of the IGL. The middle glenohumeral ligament (MGL) is considerable more variable, but may also contribute fibers to the more superior aspects of the anterior glenoid labrum as it approaches the biceps tendon. Above the epiphyseal line (i.e. the junctions of the upper and middle thirds of the glenoid body fossa), the attachment of the glenoid labrum is variable. Inferior to the epiphyseal line, the labrum is continuous with the glenoid articular cartilage and serves as the insertion site for the IGL. It is the superior and anterosuperior portion of the labrum that can be variable attached to the glenoid. There are three different types of attachment of the biceps labral complex (BLC) to the glenoid. IGL-The IGL consists of anterior and posterior bands and an axillary pouch that attaches to the inferior two-thirds of the entire circumference of the glenoid by means of the labrum. The IGL is lax in the adducted position. As it tightens with increasing adduction, the anterior and posterior. MGL-The MGL attaches to the anterior aspect of the anatomic neck of the humerus, medial to the lesser tuberosity. It arises from the glenoid by way of the labrum and scapular neck. The foramen of Weitbrecht is located between the superior glenohumeral ligament (SGL) and MGL, and the foramen of Rouviere is located between the MGL and IGL. SGL-The SGL originates from the upper pole of the glenoid cavity and base of the coracoid process, and is attached to the MGL, to the biceps tendon, and to the labrum. It inserts just superior to the lesser tuberosity in the region of biciptal groove.  

Cite This Abstract

Stoller, D, MR of Glenohumeral Ligaments and Biceps Labral Complex.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/12020093.html