Distinguishing Superior Labral Tears from Normal Meniscoid Insertions with Magnetic Resonance Imaging

2012 ◽  
Vol 2 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Ankur M Manvar ◽  
Sheetal M Bhalani ◽  
Grant E Garrigues ◽  
Nancy M Major
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Signal Intensity ◽  
Labral Tear ◽  
High Signal ◽  
Resonance Imaging ◽  
Superior Labrum ◽  
Labral Tears ◽  
Biceps Anchor ◽  
Labral Pathology

ABSTRACT Objective To improve the magnetic resonance imaging (MRI) and magnetic resonance arthrogram (MRA) interpretation of a ‘meniscoid-type’ superior labrum vs a superior labral tear by evaluation of a simple sign. Materials and methods Retrospective analysis of our institution's shoulder MRIs and MRAs yielded 144 patients thought to have a superior labral tear. Fifty-five patients had arthroscopy. Analysis of the orthopaedic database for superior labral repair surgeries performed in the same time frame yielded seven additional patients without prospective MRI/MRA diagnosis of superior labral tear. Results Two of 17 (11.8%) patients thought to have superior labral tears by MRI or MRA were found to have no labral pathology at arthroscopy. Both cases failed to have extension of high signal intensity behind the biceps anchor to the most posterior oblique coronal image. Nine of 38 (23.7%) patients thought to have superior labral tears by MRI or MRA were found to have no labral pathology at arthroscopy, but a meniscoid-type superior labrum. Four of seven patients known to have superior labral tears by arthroscopy but incorrectly diagnosed as meniscoid-type superior labrum on MRI or MRA, were retrospectively found to have extension of high signal intensity in the superior labrum to the most posterior image. Conclusion Signal abnormality that continues through the remainder of the superior labrum posterior to the biceps anchor indicates a superior labral tear. Absence of this sign in the setting of more anterior high signal under the labrum may indicate a meniscoid variant. Manvar AM, Bhalani SM, Garrigues GE, Major NM. Distinguishing Superior Labral Tears from Normal Meniscoid Insertions with Magnetic Resonance Imaging. The Duke Orthop J 2012;2(1):44-49.

scholarly journals Magnetic resonance imaging evaluation of meniscoid superior labrum: normal variant or superior labral tear

2016 ◽  
Vol 49 (4) ◽  
pp. 220-224 ◽  
Author(s):  
Marcelo Novelino Simão ◽  
Emily N. Vinson ◽  
Charles E. Spritzer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Final Analysis ◽  
Labral Tear ◽  
Resonance Imaging ◽  
Imaging Evaluation ◽  
Magnetic Resonance Imaging Evaluation ◽  
Superior Labrum ◽  
Labral Tears ◽  
Operative Report

Abstract Objective: The objective of this study was to determine the incidence of a "meniscoid" superior labrum. Materials and Methods: This was a retrospective analysis of 582 magnetic resonance imaging examinations of shoulders. Of those 582 examinations, 110 were excluded, for a variety of reasons, and the final analysis therefore included 472 cases. Consensus readings were performed by three musculoskeletal radiologists using specific criteria to diagnose meniscoid labra. Results: A meniscoid superior labrum was identified in 48 (10.2%) of the 472 cases evaluated. Arthroscopic proof was available in 21 cases (43.8%). In 10 (47.6%) of those 21 cases, the operative report did not include the mention a superior labral tear, thus suggesting the presence of a meniscoid labrum. In only one of those cases were there specific comments about a mobile superior labrum (i.e., meniscoid labrum). In the remaining 11 (52.4%), surgical correlation demonstrated superior labral tears. Conclusion: A meniscoid superior labrum is not an infrequent finding. Depending upon assumptions and the requirement of surgical proof, the prevalence of a meniscoid superior labrum in this study was between 2.1% (surgically proven) and 4.8% (projected). However, superior labral tears are just as common and are often confused with meniscoid labra.

scholarly journals Differentiation between Pure Mucinous Breast Carcinomas and Fibroadenomas with Strong High-Signal Intensity on T2-Weighted Images from Dynamic Contrast-Enhanced Magnetic Resonance Imaging

Breast Care ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 32-37
Author(s):  
Ning Qu ◽  
Yahong Luo ◽  
Tao Yu ◽  
Huihui Yu
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Signal Intensity ◽  
High Signal ◽  
Breast Carcinomas ◽  
Resonance Imaging ◽  
Enhancement Pattern ◽  
Dce Mri ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced

Objective: This study aimed to identify characteristics that can differentiate between pure mucinous breast carcinomas (PMBCs) and fibroadenomas (FAs) with strong high-signal intensity on T2-weighted images (T2-SHi) from dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). Methods: The DCE-MRI tumor characteristics were compared and analyzed between 35 PMBCs and 70 FAs with T2-SHi. Results: Multivariate analysis revealed that delayed enhancement pattern was the only significant independent predictor (p = 0.007). Conclusion: A delayed enhancement pattern is the most reliable characteristic for differentiating PMBCs from FAs with T2-SHi from DCE-MRI.

EXTENSIVE WHITE MATTER CHANGES AFTER STEREOTACTIC RADIOSURGERY FOR BRAIN ARTERIOVENOUS MALFORMATIONS

Neurosurgery ◽  
2008 ◽  
Vol 63 (6) ◽  
pp. 1064-1070 ◽  
Author(s):  
René van den Berg ◽  
Dennis R. Buis ◽  
Frank J. Lagerwaard ◽  
Geert J. Lycklama à Nijeholt ◽  
W. Peter Vandertop
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Signal Intensity ◽  
Arteriovenous Malformations ◽  
High Signal Intensity ◽  
High Signal ◽  
Resonance Imaging ◽  
White Matter Changes ◽  
Intensity Changes ◽  
Brain Avms

Abstract OBJECTIVE Perinidal high-signal-intensity changes on T2-weighted magnetic resonance imaging can be seen surrounding radiosurgically treated brain arteriovenous malformations (AVM). Occasionally, these signal intensity changes develop far beyond the irradiated volume. A retrospective analysis of both the pre- and postradiosurgery magnetic resonance imaging and angiographic studies was performed to analyze the cause of these extensive perinidal white matter changes. METHODS The pre- and postradiosurgical magnetic resonance imaging and angiographic studies of 30 patients with T2 high-signal-intensity changes surrounding a brain AVM were analyzed retrospectively. Patients were divided into 2 groups on the basis of the extension of the signal intensity changes within or beyond the 10-Gy isodose area. The angiographic analysis was focused on the venous drainage pattern (deep versus superficial), venous stenosis, and the number of draining veins before and after radiosurgery. In addition, the obliteration rate was determined for the 2 subgroups. RESULTS Fourteen patients (47%) showed high-signal-intensity changes far beyond the 10-Gy isodose area. A single draining vein was more often present in these patients with extensive T2 hyperintensity signal changes than in the other group. Obliteration was achieved in 12 (88%) of 14 patients with extensive signal intensity changes, as opposed to 8 (50%) of 16 patients in the other group. CONCLUSION High-signal-intensity changes after radiosurgery for brain AVMs, far beyond the 10-Gy isodose area on T2-weighted images, are especially seen in brain AVMs draining through a single vein. The higher occlusion rate of brain AVMs under these circumstances is well appreciated.

Added Value of Thoracic Magnetic Resonance Imaging in the Differential Diagnosis Between Peripheral Lung Cancer and Progressive Massive Fibrosis of Coal Silicosis

2020 ◽  
Vol 10 (4) ◽  
pp. 974-977
Author(s):  
Peng Du ◽  
Zi-Wei Guo ◽  
Wei Mao ◽  
Hai-Yan Zhang ◽  
Quan Wang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lung Cancer ◽  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal ◽  
Resonance Imaging ◽  
Peripheral Lung ◽  
Progressive Massive Fibrosis

To compare the thoracic magnetic resonance imaging (TMRI) features between peripheral lung cancer (PLC) and progressive massive fibrosis (PMF) of coal silicosis (CS), and to excavate information of differential diagnostic value. 68 patients with PLC (68 lesions) were selected as lung cancer group (LCG), and 50 patients with PMF of CS (78 lesions) were selected as coal silicosis group (CSG). TMRI was performed in both groups, and T1-weighted imaging (T1WI), T2-weighted imaging (T2WI) and Spectral pre-saturated inversion recovery (SPIR) were used. The differences and characteristics of TMRI between the two groups were analyzed. 55 cases of pulmonary masses (PM) in LCG showed iso-signal intensity on T1WI (80.9%), and 63 cases showed high-signal intensity on T2WI and SPIR (92.6%); 65 cases of PMF in CSG showed iso-signal intensity on T1WI (83.5%), and high-signal intensity on T2WI and SPIR was found in 4 cases (5.1%), but 67 cases showed low-signal intensity (85.9%). PMF in CSG with high-signal intensity on T2WI and SPIR were significantly lower than PM in LCG(P < 0.1). Compared with TMRI of PLC showed high-signal intensity on T2WI and SPIR, PMF in CS showed low-signal intensity on T2WI and SPIR. This feature is of important significance in differential diagnosis.

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