Humeral avulsion of the posterior band of the inferior glenohumeral ligament: MR arthrography and clinical correlation in 17 patients.
OBJECTIVE
The purpose of this article is to describe the MR arthrography findings of humeral avulsion of the posterior band of the inferior glenohumeral ligament in 17 patients. To elucidate the clinical importance of this abnormality, we also correlate our imaging findings with the presence of coexisting structural abnormalities; clinical presentation; and, when available, arthroscopic evaluation (n = 8).


CONCLUSIONS
Humeral avulsion or insufficiency of the posterior band of the inferior glenohumeral ligament can be easily detected using MR arthrography. This ligamentous abnormality may be seen in isolation, or it may occur in conjunction with posterior or, less often, anteroinferior capsulolabral abnormalities. The presence of this lesion in a subgroup of patients with the clinical diagnosis of multidirectional instability may offer insight into the causes and pathogenesis of this complex entity.
Department of Radiology, UCSD and VAHCS, 3350 La Jolla Village Dr., La Jolla, CA 92161, USA.
Christine B
CB
Chung
Steven
S
Sorenson
Jerry R
JR
Dwek
Donald
D
Resnick
D000293:Adolescent; D000328:Adult; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D006811:Humerus / Q000473:pathology*; D007472:Iohexol; D008023:Ligaments, Articular / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012783:Shoulder Dislocation / Q000175:diagnosis*
D003287:Contrast Media; D007472:Iohexol; C064925:gadodiamide; D019786:Gadolinium DTPA