Cliniques Universitaires St Luc Leuven

Brussels, Belgium

Cliniques Universitaires St Luc Leuven

Brussels, Belgium

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Gondim Teixeira P.A.,Nancy University Hospital Center | Omoumi P.,Cliniques Universitaires St Luc Leuven | Trudell D.J.,Veterans Administration Medical Center | Ward S.R.,Veterans Administration Medical Center | And 2 more authors.
Skeletal Radiology | Year: 2011

Introduction The anterior oblique ligament is one of the main stabilizers of the trapeziometacarpal joint. Insufficiency of this ligament is closely linked to degenerative joint disease. Highresolution musculoskeletal ultrasound has advantages over magnetic resonance imaging (availability, dynamic nature, cost, patient comfort). This study evaluates the feasibility of ultrasound of the anterior oblique ligament. Material and methods Ten cadaveric thumb specimens and 10 volunteers with normal trapeziometacarpal joints underwent imaging with high-frequency ultrasound. An ultrasoundguided, progressive dissection technique was used to confirm the ultrasound findings. Two radiologists reviewed the images in consensus. The detectability of the ligament was rated. Results The anterior oblique ligament was identified and measured in 90% of the specimens and 100% of the volunteers. The ultrasound findings correlated well with the dissections. This ligament appeared as a thin hypoechogenic structure in the ulnar-most part of the trapeziometacarpal joint, with a thickness that varied from 1.0 to 2.0 mm. Detectability of this ligament was good in 66% of the specimens and 100% of the volunteers. Conclusion Ultrasound evaluation of the anterior oblique ligament of the trapeziometacarpal joint is feasible with state of the art equipment. © ISS 2011.


Gondim Teixeira P.A.,Nancy University Hospital Center | Omoumi P.,Cliniques Universitaires St Luc Leuven | Trudell D.J.,Veterans Administration Medical Center | Ward S.R.,Veterans Administration Medical Center | And 3 more authors.
European Radiology | Year: 2011

Objective: The Lateral Collateral Ligamentous complex (LCL) is an important stabiliser of the elbow. It has a Y-shaped structure with three components. In this study, we sought to describe the ultrasound aspect of the individual components of this ligamentous complex and to evaluate the performance of ultrasound in both cadavers and in normal subjects. Methods: Ten cadaveric elbow specimens underwent high-frequency ultrasound. Two specimens were sliced and two were dissected for anatomical correlation. Ten elbows of normal subjects were also evaluated by ultrasound. The findings were compared. Results: The three components of the LCL could be visualised in all specimens and normal subjects with the exception of the proximal portion of one specimen. In 80% of the specimens and 100% of the healthy volunteers the proximal portion of the LCL could be separated from the extensor tendons. Conclusion: High-resolution ultrasound can assess all components of the LCL of the elbow and can distinguish them from surrounding structures. © 2011 The Author(s).


Omoumi P.,Cliniques Universitaires St Luc Leuven | Omoumi P.,University of Lausanne | Michoux N.,Cliniques Universitaires St Luc Leuven | Roemer F.W.,Klinikum Augsburg | And 2 more authors.
Osteoarthritis and Cartilage | Year: 2015

Objective: To evaluate the thickness of cartilage at the posterior aspect of the medial and lateral condyle in Osteoarthritis (OA) knees compared to non-OA knees using computed tomography arthrography (CTA). Design: 535 consecutive knee CTAs (mean patient age=48.7±16.0; 286 males), were retrospectively analyzed. Knees were radiographically classified into OA or non-OA knees according to a modified Kellgren/Lawrence (K/L) grading scheme.Cartilage thickness at the posterior aspect of the medial and lateral femoral condyles was measured on sagittal reformations, and compared between matched OA and non-OA knees in the whole sample population and in subgroups defined by gender and age. Results: The cartilage of the posterior aspect of medial condyle was statistically significantly thicker in OA knees (2.43mm (95% confidence interval (CI)=2.36, 2.51)) compared to non-OA knees (2.13mm (95%CI=2.02, 2.17)) in the entire sample population (P<0.001), as well as for all subgroups of patients over 40 years old (all P≤0.01), except for females above 60 years old (P=0.07). Increase in cartilage thickness at the posterior aspect of the medial condyle was associated with increasing K/L grade in the entire sample population, as well as for males and females separately (regression coefficient=0.10-0.12, all P<0.001). For the lateral condyle, there was no statistically significant association between cartilage thickness and OA (either presence of OA or K/L grade). Conclusions: Cartilage thickness at the non-weight-bearing posterior aspect of the medial condyle, but not of the lateral condyle, was increased in OA knees compared to non-OA knees. Furthermore, cartilage thickness at the posterior aspect of the medial condyle increased with increasing K/L grade. © 2014 Osteoarthritis Research Society International.


Omoumi P.,Cliniques Universitaires St Luc Leuven | Omoumi P.,University of Lausanne | Michoux N.,Cliniques Universitaires St Luc Leuven | Thienpont E.,Cliniques Universitaires St Luc Leuven | And 2 more authors.
Osteoarthritis and Cartilage | Year: 2015

To determine subregions of normal and abnormal cartilage in advanced stages of femorotibial osteoarthritis (OA) by mapping the entire femorotibial joint in a cohort of pre-total knee replacement (TKR) OA knees. Design: We defined an areal subdivision of the femorotibial articular cartilage surface on CT arthrography (CTA), allowing the division of the femorotibial articular surface into multiple (up to n=204 per knee) subregions and the comparison of the same areas between different knees.Two readers independently classified each cartilage area as normal, abnormal or non-assessable in 41 consecutive pre-TKR OA knees. Results: A total of 6447 cartilage areas (from 41 knees) were considered assessable by both readers.The average proportion of preserved cartilage was lower in the medial femorotibial joint than in the lateral femorotibial joint for both readers (32.0/69.8% and 33.9/68.5% (medial/lateral) for reader 1 and 2 respectively, all P<0.001).High frequencies of normal cartilage were observed at the posterior aspect of the medial condyle (up to 89%), and the anterior aspect of the lateral femorotibial compartment (up to 100%). The posterior aspect of the medial condyle was the area that most frequently exhibited preserved cartilage in the medial femorotibial joint, contrasting with the high frequency of cartilage lesions in the rest of that compartment. Conclusions: Cartilage at the posterior aspect of the medial condyle, and at the anterior aspect of the lateral femorotibial compartment, may be frequently preserved in advanced grades of OA. © 2014 Osteoarthritis Research Society International.

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