Background Shoulder impingement is an important entity and has to be proved with imaging and pathologically if needed. This research is acquired for the clinical and surgical applications of impingement, based upon MR imaging.
Objectives to determine the acromio-humeral, coraco-humeral, and coraco-clavicular distances with magnetic resonance imaging (MRI) in the diagnosis of shoulder impingement syndrome.
Methods All the acromio-humeral, coraco-humeral, and coraco-clavicular intervals of all patients were reviewed retrospectively. A total of 132 shoulders (76 right and 56 left shoulders) with impingement syndrome (40 males and 92 females, with 79 cases surgically confirmed and the remaining 53 cases clinically and radiologically suspected) and 40 control group patients were included. Statistical correlation of this research was assessed by Fisher’s Exact t test and Pearson chi-square test-correlation coefficients.
Results In the correlation of average acromio-humeral, coraco-humeral, and coraco-clavicular intervals (AHI, CHI, and CCI, respectively), there were significant statistical differences between patient and control groups; all the intervals were found to be higher in the control group. A moderate positive relation between average AHI and CHI, between AHI and CCI, and between CCI and CHI has been found. All intervals in the patient group increase or decrease dependently on each other. No proper cut-off values were determined using a receiver operating characteristic curve for all intervals between patient and control groups
Conclusions Acromio-humeral, coraco-humeral, and coraco-clavicular intervals were extremely lower in the shoulder impingement syndrome and had significant importance in the diagnosis of subacromial and subcoracoid impingements.
References Graichen H, Bonel H, Stammberger T, Haubner M, Rohrer H, Englmeier KH, et al. Three-dimensional analysis of the width of the subacromial space in healthy subjects and patients with impingement syndrome. AJR. 1999;172(4):1081–1086
Gerber C, Terrier F, Ganz R. The role of coracoid process in the chronic impingement syndrome. J Bone Joint Surg. 1985;67(5):703–708
Giaroli EL, Major NM, Lemley DE, Lee J. Coracohumeral interval imaging in subcoracoid impingement syndrome on MRI. AJR. 2006;186(1):242–246
Neto AAF, Almeida AM, Maiorino R, Filho AZ, Benegas E. An anatomical study of the subcoracoid space. Clinics. 2006;61(5):467–472
Giaroli EL, Major NM, Higgings LD. MRI of internal impingement of the shoulder. AJR. 2005;185(10):925–929
Ferrick MR. Coracoid impingement: a case report and review of the literature. Am J Sports Med. 2000;28:11–119
Saupe N, Pfirrmann CWA, Schmid MR, Jost B, Werner CML, Zanetti M. Association between rotator cuff abnormalities and reduced acromio-humeral distance. AJR. 2006;187(2):376–382
Nove-Josserand L, Levigne C, Noel E, Walch G. The acromio-humeral interval. A study of the factors influencing its height. Rev Chir Orthop Reparatrice Appar Mot. 1996;82(5):379–385
Disclosure of Interest None Declared