Key result
Acromial thickness, acromio-humeral distance, acromial index, and lateral acromial angle were different in patients with rotator cuff tears compared to controls.
Why the study?
Does acromial morphology assessed by MRI associate with the presence and severity of rotator cuff tears?
Case-Control (n=86)
Does acromial morphology assessed by MRI associate with the presence and severity of rotator cuff tears?
MRI-based assessment of acromial morphology reveals significant differences in patients with rotator cuff tears, with type-III (hooked) acromion identified as a potential risk factor for full thickness tears.
Answers are grounded in this paper and cite their sources.
Findings should not yet inform rotator cuff tear management; leaves open acromial morphology as a risk marker pending prospective validation.
To identify the morphological characteristics of the acromion associated with RCT using MRI. Also, to recognize which type of the acromion could be risk factor for full thickness RCT. Fifty-six patients with RCT (either partial or full thickness tear) and 30 control volunteers were enrolled in this study. Their shoulders were imaged by MRI. The acromial shapes were classified into type I (flat), type II (curved), type III (hooked) and type IV (convex). Additional measurements including acromial thickness, acromio-humeral distance (AHD), acromial index (AI) and lateral acromial angle (LAA) were performed for further assessment. Type-II was the most commonly encountered acromial shape in both patients with RCT (44.6%) and control group (43.3%) with no significant difference in the incidence of each acromial shape between the two groups (P > 0.05). The acromial thickness, AHD, AI and LAA were significantly different in patients with RCT compared to control group (P < 0.001). Full thickness tear was significantly associated with type-III (P < 0.05). Type-III acromion (hooked shaped) could be a risk factor for full thickness RCT.
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Mohamed et al. (2013) conducted a case-control in Rotator cuff tear (n=86). Acromial morphology vs. Control volunteers was evaluated on Acromial thickness, acromio-humeral distance (AHD), acromial index (AI) and lateral acromial angle (LAA) (p=<0.001). Acromial thickness, acromio-humeral distance, acromial index, and lateral acromial angle were different in patients with rotator cuff tears compared to controls.
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