Clinical Significance of Intramuscular Cysts in the Rotator Cuff and Their Relationship to Full- and Partial-Thickness Rotator Cuff Tears

Manvar, Ankur; Kamireddi, Ajay; Bhalani, Sheetal M.; Major, Nancy M.

doi:10.2214/ajr.07.3727

Cited by 24 publications

(9 citation statements)

References 9 publications

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“…On MRI, possible features of external impingement are a large amount of fluid within the subacromial bursa and medial to the acromioclavicular joint [9], a reduction in the acromiohumeral distance [10], the presence of downward facing acromioclavicular joint osteophytes [11], the shape of the acromion [12] [13] [14], an os acromiale [15] and rotator cuff lesions [16] [17]. However, many of the above lesions have been found in asymptomatic shoulders making radiological diagnosis unreliable.…”

Section: Discussionmentioning

confidence: 99%

Inter Observer Variability in the Specificity of Magnetic Resonance Imaging for External Impingement of the Shoulder—Is There Agreement among Radiologists?

Baraza¹,

Goswam²,

Shahban³

2017

OALib

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Purpose: External impingement in the shoulder is a condition characterised by tenderness in the antero-lateral aspect of the shoulder on arm elevation due to an absolute or relative decrease in the subacromial space. Magnetic resonance imaging (MRI) is frequently utilised to confirm the condition and rule out other differential diagnoses. We conducted a study to look at the inter observer variability in specificity of MRI scanning in impingement of the shoulder. Methods: Twenty-six shoulders aged between 20 and 34 who all presented with shoulder instability only were included in the study. Three experienced consultant musculoskeletal radiologists were then asked to comment on the presence or absence of impingement on reviewing their MRI scans. Results: Radiologist 1 (R1) diagnosed 7 shoulders with impingement and 19 shoulders without. Radiologist 2 (R2) observed that 13 shoulders had radiological signs of impingement and 13 did not, and radiologist 3 (R3) suspected impingement in 20 shoulders with 6 shoulders normal. For R1 and R2, the agreement was 0.58 with a kappa value of 0.16. Between R2 and R3, the agreement was also 0.58 with a kappa value of 0.16. Comparing R1 and R3, the agreement was 0.46 and the kappa value was 0.14. Across all three radiologists, there was agreement in 8 out of the 26 MRI scans (31%) but only in 4 out of the 26 (15.4%) did they all agree that impingement was not present. Conclusion: MRI should be used judiciously in the work up of patients with external impingement of the shoulder.

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Section: Discussionmentioning

confidence: 99%

Inter Observer Variability in the Specificity of Magnetic Resonance Imaging for External Impingement of the Shoulder—Is There Agreement among Radiologists?

Baraza¹,

Goswam²,

Shahban³

2017

OALib

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“…[2][3][4][5] Paralabral cysts occur in 2% to 3% of symptomatic shoulders. 7,8 They are located mostly medial to the glenoid rim, lying in the supraspinatus or infraspinatus fossa, and can enlarge around the supraglenoid and spinoglenoid notch. They are often asymptomatic but can be associated with rotator cuff tears 7 or glenoid labral tears.…”

Section: Discussionmentioning

confidence: 99%

“…Intramuscular rotator cuff cysts have been well characterised and found to be associated with rotator cuff disease. 7 This report describes the very unusual occurrence of a cyst within the supraspinatus tendon itself, causing shoulder impingement. Intratendinous supraspinatus cysts have not been described before.…”

Section: Introductionmentioning

confidence: 93%

Intratendinous supraspinatus cyst as a cause of shoulder impingement

et al. 2014

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We report the case of a 29-year-old gentleman with shoulder impingement. An articular-sided intratendinous supraspinatus cyst was identified as the cause of his symptoms. Arthroscopic cyst debridement resulted in a good outcome at 1-year follow-up. Cysts around the shoulder are a well described pathological entity. They consist of different categories, including intraosseus cysts of the humeral head and glenoid, paralabral cysts and cysts associated with the acromioclavicular joint. Although paralabral cysts that lie intramuscularly or between the muscle bellies have frequently been reported, this is the first report of an intratendinous supraspinatus cyst with an intact rotator cuff. We describe the case, its management and the postsurgical outcome.

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“…29 Manval et al demonstrated that intramuscular cysts can be seen in equal proportions with full-thickness or partial-thickness rotator cuff tears. 30 Because these cysts are typically small and located within the muscle, they are not seen during surgery or arthroscopy, and are not palpable on physical examination. The cysts may occur within the muscle of the torn tendon (►Fig.…”

Section: Periarticular Cysts Intramuscular Cystmentioning

confidence: 99%

Imaging of Cysts and Bursae about the Shoulder

Meraj

Bencardino

Steinbach

2014

Semin Musculoskelet Radiol

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A variety of fluid and fluid-like containing structures can be seen on routine MR imaging of the shoulder including bursal effusions and cystic lesions often in association with rotator cuff tears and impingement. Given its high soft tissue contrast and multiplanar imaging capabilities, MR imaging is the modality of choice in quantifying size, confirming fluid composition, assessing anatomical relationship to the glenohumeral joint, and determining the presence/absence of accompanying intra-articular abnormalities in association with the bursal and juxta-articular cystic findings.

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Clinical Significance of Intramuscular Cysts in the Rotator Cuff and Their Relationship to Full- and Partial-Thickness Rotator Cuff Tears

Cited by 24 publications

References 9 publications

Inter Observer Variability in the Specificity of Magnetic Resonance Imaging for External Impingement of the Shoulder—Is There Agreement among Radiologists?

Inter Observer Variability in the Specificity of Magnetic Resonance Imaging for External Impingement of the Shoulder—Is There Agreement among Radiologists?

Intratendinous supraspinatus cyst as a cause of shoulder impingement

Imaging of Cysts and Bursae about the Shoulder

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