Sharpened lateral acromion morphology (SLAM sign) as an indicator of rotator cuff tear: a retrospective matched study.
Acromion
SLAM sign
critical shoulder angle
frozen shoulder
hooked acromion
rotator cuff tear
Journal
JSES international
ISSN: 2666-6383
Titre abrégé: JSES Int
Pays: United States
ID NLM: 101763461
Informations de publication
Date de publication:
Sep 2021
Sep 2021
Historique:
entrez:
10
9
2021
pubmed:
11
9
2021
medline:
11
9
2021
Statut:
epublish
Résumé
Bigliani types of acromion and critical shoulder angle (CSA) have been implicated as indicators of rotator cuff disease. A sharpened inferolateral edge of acromion (termed as Sharpened Lateral Acromion Morphology or SLAM sign) is frequently observed in anteroposterior radiographs of the glenohumeral joint in patients with rotator cuff tears (RCT). We aimed to evaluate the association of the SLAM sign with RCT in comparison to high CSA (≥35°) and Bigliani type 3 (hooked) acromion. A cohort of 100 consecutive patients undergoing non-arthroplasty surgery for RCT and 106 patients with primary frozen shoulder were matched manually in 1:1 ratio based on age and gender to yield study population with 50 patients in each group. The 2 groups were compared for the presence of the SLAM sign, high CSA, and type 3 acromion on the radiographs. All the 3 parameters were found more prevalent in the RCT group than the frozen shoulder group (SLAM, 46% vs. 0; high CSA, 60% vs. 40%; type 3 acromion, 18% vs. 4%) ( The SLAM sign is a simple and easily identifiable radiological predictor of rotator cuff disease.
Sections du résumé
BACKGROUND
BACKGROUND
Bigliani types of acromion and critical shoulder angle (CSA) have been implicated as indicators of rotator cuff disease. A sharpened inferolateral edge of acromion (termed as Sharpened Lateral Acromion Morphology or SLAM sign) is frequently observed in anteroposterior radiographs of the glenohumeral joint in patients with rotator cuff tears (RCT). We aimed to evaluate the association of the SLAM sign with RCT in comparison to high CSA (≥35°) and Bigliani type 3 (hooked) acromion.
METHODS
METHODS
A cohort of 100 consecutive patients undergoing non-arthroplasty surgery for RCT and 106 patients with primary frozen shoulder were matched manually in 1:1 ratio based on age and gender to yield study population with 50 patients in each group. The 2 groups were compared for the presence of the SLAM sign, high CSA, and type 3 acromion on the radiographs.
RESULTS
RESULTS
All the 3 parameters were found more prevalent in the RCT group than the frozen shoulder group (SLAM, 46% vs. 0; high CSA, 60% vs. 40%; type 3 acromion, 18% vs. 4%) (
CONCLUSION
CONCLUSIONS
The SLAM sign is a simple and easily identifiable radiological predictor of rotator cuff disease.
Identifiants
pubmed: 34505095
doi: 10.1016/j.jseint.2021.05.013
pii: S2666-6383(21)00162-6
pmc: PMC8411071
doi:
Types de publication
Journal Article
Langues
eng
Pagination
850-855Informations de copyright
© 2021 The Authors.
Références
J Shoulder Elbow Surg. 2016 Mar;25(3):413-21
pubmed: 26652696
Clin Radiol. 1996 Dec;51(12):869-72
pubmed: 8972653
J Shoulder Elbow Surg. 2005 Nov-Dec;14(6):591-8
pubmed: 16337525
J Bone Joint Surg Am. 2006 Apr;88(4):800-5
pubmed: 16595470
Biometrics. 1977 Mar;33(1):159-74
pubmed: 843571
J Shoulder Elbow Surg. 2012 Oct;21(10):1289-98
pubmed: 22217644
J Shoulder Elbow Surg. 1995 Nov-Dec;4(6):454-61
pubmed: 8665291
Clin Orthop Relat Res. 2003 Feb;(407):86-91
pubmed: 12567135
Am J Sports Med. 2018 Feb;46(2):441-448
pubmed: 29144771
J Bone Joint Surg Br. 1949 Aug;31B(3):436-42
pubmed: 18148779
Arthroscopy. 2018 Mar;34(3):771-780
pubmed: 29100767
Arthroscopy. 2019 Dec;35(12):3304-3315.e2
pubmed: 31785763
Am J Sports Med. 2014 Nov;42(11):2621-6
pubmed: 25117727
Clin Orthop Relat Res. 2003 Oct;(415):111-20
pubmed: 14612637
J Bone Joint Surg Am. 2001 Jan;83(1):71-7
pubmed: 11205861
J Bone Joint Surg Am. 2010 Nov 17;92(16):2623-33
pubmed: 21084574
SICOT J. 2017;3:4
pubmed: 28074776
J Shoulder Elbow Surg. 1998 Mar-Apr;7(2):134-9
pubmed: 9593091
Am J Sports Med. 2014 Jun;42(6):1296-303
pubmed: 24733157
J Orthop Res. 2004 Jan;22(1):202-7
pubmed: 14656681
Am J Sports Med. 2008 May;36(5):987-93
pubmed: 18413681
J Shoulder Elbow Surg. 2013 Jul;22(7):901-7
pubmed: 23312822
J Orthop Res. 2014 Jul;32(7):952-7
pubmed: 24700399
Clin Orthop Relat Res. 2010 Jun;468(6):1542-50
pubmed: 19760471
Bone Joint J. 2013 Jul;95-B(7):935-41
pubmed: 23814246
J Bone Joint Surg Am. 1972 Jan;54(1):41-50
pubmed: 5054450
Acta Orthop. 2013 Apr;84(2):178-83
pubmed: 23409811
J Shoulder Elbow Surg. 2010 Jan;19(1):116-20
pubmed: 19540777
Arthroscopy. 2007 Jan;23(1):81-8
pubmed: 17210431