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1. Noninfectious Arthritis

Author

Gheno, Ramon, Pansini, Vittorio, Rosca, Cristina Elena, Flipo, René-Marc, Cotten, Anne, Guglielmi, Giuseppe, editor, Peh, Wilfred C. G., editor, and Guermazi, Ali, editor

Published
2013
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8. Chiasma crurale: intersection of the tibialis posterior and flexor digitorum longus tendons above the ankle. Magnetic resonance imaging-anatomic correlation in cadavers

Author

Buck, Florian, Gheno, Ramon, Nico, Marcelo, Haghighi, Parviz, Trudell, Debra, Resnick, Donald, Buck, Florian, Gheno, Ramon, Nico, Marcelo, Haghighi, Parviz, Trudell, Debra, and Resnick, Donald

Abstract

Purpose: To determine the precise anatomy and magnetic resonance (MR) imaging appearance of the chiasma crurale in cadavers, paying special attention to degenerative changes Material and methods: Twelve fresh human ankles were harvested from 11 nonembalmed cadavers (mean age at death 77years) and used according to institutional guidelines. MR imaging and MR tenography were used to investigate the anatomy of the chiasma crurale using proton density-weighted sequences. The gross anatomy of the chiasma crurale was evaluated and compared to the MR imaging findings. Histology was used to elucidate further the structure of the chiasma crurale. Results: Above the chiasma, five specimens had a small amount of fat tissue between the tibialis posterior and flexor digitorum longus tendon. In all specimens both tendons had a sheath below the chiasma but not above it. At the central portion of the chiasma there was no soft tissue between the tendons, except in two specimens that showed an anatomic variant consisting of a thick septum connecting the tibial periosteum and the deep transverse fascia of the leg. In MR images, eight specimens showed what were believed to be degenerative changes in the tendons at the level of the chiasma. However, during gross inspection and histologic analysis of the specimens, there was no tendon degeneration visible. Conclusion: At the central portion of the chiasma, there is no tissue between the tibialis posterior and flexor digitorum longus tendons unless there is an anatomic variant. At the chiasma crurale, areas with irregular tendon surfaces are normal findings and are not associated with tendon degeneration (fraying)

Published
2018

9. Can osseous landmarks in the distal medial humerus be used to identify the attachment sites of ligaments and tendons: paleopathologic-anatomic imaging study in cadavers

Author

Buck, Florian, Zoner, Cristiane, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo, Trudell, Debra, Randall, Tori, Resnick, Donald, Buck, Florian, Zoner, Cristiane, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo, Trudell, Debra, Randall, Tori, and Resnick, Donald

Abstract

Objective: To describe osseous landmarks that allow identification of the attachments of the ligaments and tendons in the distal medial aspect of the humerus. Materials and methods: Reliable osseous landmarks in the distal medial aspect of the humerus were identified in 34 well-preserved specimens from a paleopathologic collection. These osseous landmarks were then sought in magnetic resonance (MR) images of ten cadaveric elbow specimens so that the ease of their visualization and optimal imaging plane could be assessed. To assign these osseous landmarks to specific attachments of the tendons and ligaments in the distal medial humerus, we cut the specimens in slices and photographed and examined them. Subsequently, the prevalence of these osseous landmarks as well as the attachment sites of the tendons and ligaments in this location was determined. Results: We determined ten reliable osseous landmarks in the distal medial aspect of the humerus, their prevalence and ease of identification, and their relationship to the attachments of the tendons and ligaments at the medial distal humerus. Conclusion: It is possible to use osseous landmarks at the distal medial humerus to facilitate identification of the different attachments of tendons and ligaments when MR images of the elbow are assessed

Published
2018

11. Avalia??o tridimensional das extremidades inferiores de crian?as e adolescentes utilizando um sistema biplanar de radiografia de baixa dose

Author

Gheno, Ramon, Baldisserotto, Matteo, and CPF:29359660078

Subjects
MEMBROS INFERIORES - ANATOMIA, SISTEMA MUSCULOSQUEL?TICO, CIENCIAS DA SAUDE::MEDICINA [CNPQ], MEDICINA, PEDIATRIA, RADIOGRAFIA, ADOLESCENTES
Abstract

Objetivos: Avaliar as medidas tridimensionais(3D) das extremidades inferiores utilizando um sistema biplanar de baixa dose de radia??o (LDX) em crian?as e adolescentes. M?todos: Na primeira parte do estudo, medidas 3D de oito esp?cimes foram analisadas pelo LDX utilizando um programa estereosc?pico e comparadas com medidas 3D da tomografia computadorizada (TC). Na segunda parte, 47 membros inferiores de crian?as e adolescentes foram estudados utilizando medidas bi e tridimensionais. Foram avaliados: os comprimentos femoral e tibial, os ?ngulos mec?nicos femoral e tibial, as angula??es frontal e lateral do joelho e o ?ngulo c?rvico-diafis?rio. Resultados: A compara??o entre as medidas 3D pelo LDX e a TC dos esp?cimes n?o mostraram diferen?as significativas:comprimento femoral (p: 0,069), comprimento tibial (p:0,059), ?ngulo femoral mec?nico (p: 0,475), ?ngulo tibial mec?nico (p: 0,067), angula??o frontal do joelho (p: 0,198), angula??o lateral do joelho (p: 0,646) e ?ngulo c?rvico-diafis?rio (p: 0,068). A compara??o entre as medidas bi e tridimensionais nos pacientes mostraram diferen?as significativas no comprimento tibial (p: 0,003), ?ngulo femoral mec?nico (p

Published
2012

12. Classifying the Patellar Height Using Magnetic Resonance Imaging

Author

Gheno, Ramon

Subjects
Observer performance, Musculoskeletal joint, Dysplasias, MR
Abstract

Purpose Methods and Materials Results Conclusion References Personal Information, Purpose: This study was designed to study the patellar height by Magnetic Resonance Imaging using the Insall-Salvati, Modified Insall-Salvati and Caton-Deschamps indexes, to define the limits for a normal positioned patella and to indicate the most reliable...

Published
2012
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13. Can osseous landmarks in the distal medial humerus be used to identify the attachment sites of ligaments and tendons: paleopathologic–anatomic imaging study in cadavers

Author

Buck, Florian M, Zoner, Cristiane S, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo A C, Trudell, Debra J, Randall, Tori D, Resnick, Donald, Buck, Florian M, Zoner, Cristiane S, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo A C, Trudell, Debra J, Randall, Tori D, and Resnick, Donald

Abstract

Objective: To describe osseous landmarks that allow identification of the attachments of the ligaments and tendons in the distal medial aspect of the humerus. Materials and methods: Reliable osseous landmarks in the distal medial aspect of the humerus were identified in 34 well-preserved specimens from a paleopathologic collection. These osseous landmarks were then sought in magnetic resonance (MR) images of ten cadaveric elbow specimens so that the ease of their visualization and optimal imaging plane could be assessed. To assign these osseous landmarks to specific attachments of the tendons and ligaments in the distal medial humerus, we cut the specimens in slices and photographed and examined them. Subsequently, the prevalence of these osseous landmarks as well as the attachment sites of the tendons and ligaments in this location was determined. Results: We determined ten reliable osseous landmarks in the distal medial aspect of the humerus, their prevalence and ease of identification, and their relationship to the attachments of the tendons and ligaments at the medial distal humerus. Conclusion: It is possible to use osseous landmarks at the distal medial humerus to facilitate identification of the different attachments of tendons and ligaments when MR images of the elbow are assessed

Published
2010

14. Chiasma crurale: intersection of the tibialis posterior and flexor digitorum longus tendons above the ankle. Magnetic resonance imaging–anatomic correlation in cadavers

Author

Buck, Florian M, Gheno, Ramon, Nico, Marcelo A C, Haghighi, Parviz, Trudell, Debra J, Resnick, Donald, Buck, Florian M, Gheno, Ramon, Nico, Marcelo A C, Haghighi, Parviz, Trudell, Debra J, and Resnick, Donald

Abstract

Purpose: To determine the precise anatomy and magnetic resonance (MR) imaging appearance of the chiasma crurale in cadavers, paying special attention to degenerative changes Material and methods: Twelve fresh human ankles were harvested from 11 nonembalmed cadavers (mean age at death 77years) and used according to institutional guidelines. MR imaging and MR tenography were used to investigate the anatomy of the chiasma crurale using proton density-weighted sequences. The gross anatomy of the chiasma crurale was evaluated and compared to the MR imaging findings. Histology was used to elucidate further the structure of the chiasma crurale. Results: Above the chiasma, five specimens had a small amount of fat tissue between the tibialis posterior and flexor digitorum longus tendon. In all specimens both tendons had a sheath below the chiasma but not above it. At the central portion of the chiasma there was no soft tissue between the tendons, except in two specimens that showed an anatomic variant consisting of a thick septum connecting the tibial periosteum and the deep transverse fascia of the leg. In MR images, eight specimens showed what were believed to be degenerative changes in the tendons at the level of the chiasma. However, during gross inspection and histologic analysis of the specimens, there was no tendon degeneration visible. Conclusion: At the central portion of the chiasma, there is no tissue between the tibialis posterior and flexor digitorum longus tendons unless there is an anatomic variant. At the chiasma crurale, areas with irregular tendon surfaces are normal findings and are not associated with tendon degeneration (fraying)

Published
2010

16. Changes in the T2 relaxation value of the tibiofemoral articular cartilage about 6 months after anterior cruciate ligament reconstruction using the double-bundle technique.

Author

GHENO, RAMON, YOUNG CHEOL YOON, JOON H. WANG, KYUNGA KIM, and SUN-Y. BAEK

Subjects
*ANTERIOR cruciate ligament surgery, *ANTERIOR cruciate ligament injury treatment, *KNEE injury treatment, *FEMUR injuries, *THERAPEUTICS, MANDIBULAR condyle injuries
Abstract

Objective: To evaluate T2 relaxation values (T2RVs) of knee joint cartilage after double-bundle anterior cruciate ligament reconstruction (DB-ACLR) in a 6-month follow-up and to correlate changes between T2RVs with meniscal status and clinical findings. Methods: 27 patients who underwent DB-ACLR and MRI before and 6 months after surgery, and 27 control subjects were enrolled. We compared T2RVs of the control vs preoperative MR and pre-operative vs post-operative MR using 28 subcompartments, including superficial and deep layers. Correlations between T2RV changes with meniscal status and clinical data were examined. Results: The pre-operative T2RV was significantly higher than that of the control group in the medial tibia (posterior-superficial), posterior medial femur (superficial) and posterior lateral femur (superficial and deep). The post-operative T2RV was significantly higher than that of pre-operative T2RV in the posterior medial femur (superficial), medial tibia (anterior-deep and central-deep), lateral femur (anterior-deep, anterior-superficial and central-superficial) and posterior medial femur (deep). Moderate positive correlations between pre-operative and post-operative T2RV changes were found at the posterior medial femur (interval between injury and MR examination, and instability) and posterior lateral femur (Lysholm score). Conclusion: Patients with anterior cruciate ligament injury followed by DB-ACLR presented short-term sub- compartment T2RV changes at the medial femur, lateral femur and medial tibia. Meniscal status did not affect T2RV; however, clinical findings influenced T2RV at the posterior grooves of the medial and lateral femoral condyles. Advances in knowledge: Patients submitted to DB-ACLR presented T2RV changes in both femoral and medial tibial condyles 6 months after the surgery, affecting not just the weight-bearing areas, but also the less-weight- bearing areas. [ABSTRACT FROM AUTHOR]

Published
2016
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29. Chiasma crurale: intersection of the tibialis posterior and flexor digitorum longus tendons above the ankle. Magnetic resonance imaging-anatomic correlation in cadavers

Author

Buck, Florian, Gheno, Ramon, Nico, Marcelo, Haghighi, Parviz, Trudell, Debra, Resnick, Donald, Buck, Florian, Gheno, Ramon, Nico, Marcelo, Haghighi, Parviz, Trudell, Debra, and Resnick, Donald

Abstract

Purpose: To determine the precise anatomy and magnetic resonance (MR) imaging appearance of the chiasma crurale in cadavers, paying special attention to degenerative changes Material and methods: Twelve fresh human ankles were harvested from 11 nonembalmed cadavers (mean age at death 77years) and used according to institutional guidelines. MR imaging and MR tenography were used to investigate the anatomy of the chiasma crurale using proton density-weighted sequences. The gross anatomy of the chiasma crurale was evaluated and compared to the MR imaging findings. Histology was used to elucidate further the structure of the chiasma crurale. Results: Above the chiasma, five specimens had a small amount of fat tissue between the tibialis posterior and flexor digitorum longus tendon. In all specimens both tendons had a sheath below the chiasma but not above it. At the central portion of the chiasma there was no soft tissue between the tendons, except in two specimens that showed an anatomic variant consisting of a thick septum connecting the tibial periosteum and the deep transverse fascia of the leg. In MR images, eight specimens showed what were believed to be degenerative changes in the tendons at the level of the chiasma. However, during gross inspection and histologic analysis of the specimens, there was no tendon degeneration visible. Conclusion: At the central portion of the chiasma, there is no tissue between the tibialis posterior and flexor digitorum longus tendons unless there is an anatomic variant. At the chiasma crurale, areas with irregular tendon surfaces are normal findings and are not associated with tendon degeneration (fraying)

30. Can osseous landmarks in the distal medial humerus be used to identify the attachment sites of ligaments and tendons: paleopathologic-anatomic imaging study in cadavers

Author

Buck, Florian, Zoner, Cristiane, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo, Trudell, Debra, Randall, Tori, Resnick, Donald, Buck, Florian, Zoner, Cristiane, Cardoso, Fabiano, Gheno, Ramon, Nico, Marcelo, Trudell, Debra, Randall, Tori, and Resnick, Donald

Abstract

Objective: To describe osseous landmarks that allow identification of the attachments of the ligaments and tendons in the distal medial aspect of the humerus. Materials and methods: Reliable osseous landmarks in the distal medial aspect of the humerus were identified in 34 well-preserved specimens from a paleopathologic collection. These osseous landmarks were then sought in magnetic resonance (MR) images of ten cadaveric elbow specimens so that the ease of their visualization and optimal imaging plane could be assessed. To assign these osseous landmarks to specific attachments of the tendons and ligaments in the distal medial humerus, we cut the specimens in slices and photographed and examined them. Subsequently, the prevalence of these osseous landmarks as well as the attachment sites of the tendons and ligaments in this location was determined. Results: We determined ten reliable osseous landmarks in the distal medial aspect of the humerus, their prevalence and ease of identification, and their relationship to the attachments of the tendons and ligaments at the medial distal humerus. Conclusion: It is possible to use osseous landmarks at the distal medial humerus to facilitate identification of the different attachments of tendons and ligaments when MR images of the elbow are assessed

31. Detailed MRI-anatomic study of the lateral epicondyle of the elbow and its tendinous and ligamentous attachments in cadavers.

Author

Zoner CS, Buck FM, Cardoso FN, Gheno R, Trudell DJ, Randall TD, and Resnick D

Subjects
Aged, Aged, 80 and over, Cadaver, Female, Humans, Male, Middle Aged, Elbow Joint anatomy & histology, Humerus anatomy & histology, Ligaments anatomy & histology, Magnetic Resonance Imaging methods, Tendons anatomy & histology
Abstract

Objective: The objective of our study was to document discrete bone landmarks in the lateral epicondyle of the humerus that represent the "footprints" of those tendons and ligaments that attach to it using MRI-anatomic correlation in cadavers., Materials and Methods: Thirty-three dried humeral specimens were inspected to document bone landmarks in the lateral epicondyle. MRI with anatomic correlation was performed in 10 additional cadaveric elbows. The locations of the tendinous and ligamentous attachments to the lateral epicondyle were determined with respect to the same osseous landmarks., Results: The surface of the lateral epicondyle ranged from a flat surface to a surface with up to six discrete landmarks: superior tubercle, anterior tubercle, posterior tubercle, intertubercular sulcus, rough area surrounding the tubercles, and epicondylar ridge. The radial collateral ligament attached to the superior aspect of the intertubercular sulcus and inferior aspect of the superior tubercle and was indistinguishable from the attachment of the lateral ulnar collateral ligament. The extensor carpi radialis brevis, extensor digitorum communis, and extensor digiti minimi had a common origin in the superior aspect of the lateral epicondyle. The extensor carpi ulnaris tendon arose from the posteroinferior aspect of the lateral epicondyle., Conclusion: Our investigation documents osseous landmarks that are useful in the identification of the footprints of the tendons and ligaments that attach to the lateral epicondyle. Knowledge of these structures contributes to correct interpretation of MR images in persons with tendinous and ligamentous abnormalities in this region.

Published
2010
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32. Morphology of the distal radioulnar joint: cadaveric study with MRI and MR arthrography with the forearm in neutral position, pronation, and supination.

Author

Buck FM, Nico MA, Gheno R, Haghighi P, Trudell DJ, and Resnick D

Subjects
Aged, Aged, 80 and over, Cadaver, Contrast Media, Female, Forearm physiology, Gadolinium DTPA, Humans, Male, Middle Aged, Pronation physiology, Supination physiology, Wrist Joint physiology, Forearm anatomy & histology, Magnetic Resonance Imaging methods, Wrist Joint anatomy & histology
Abstract

Objective: The purpose of this study was to evaluate the physiologic extent and thickness of the cartilage and bare areas of the distal radioulnar joint with gross anatomic examination, MRI, and MR arthrography with the forearm in neutral position, maximal pronation, and maximal supination., Materials and Methods: MRI and MR arthrography were performed on 10 cadaveric specimens (mean age at death, 82.9 years; range, 56-97 years) with the forearm in neutral position, maximal pronation, and maximal supination. Cartilage surface and thickness were assessed, and degenerative changes and bare areas were evaluated in consensus by two musculoskeletal radiologists. Gross anatomic and histologic examinations were used as the reference standard., Results: MRI in maximal pronation and supination was helpful in evaluation of the ulnar cartilage. In the axial plane, any change in cartilage thickness in the ulnar head was related to chondral degeneration. In the coronal plane, cartilage thickness proved to be an unreliable sign in the assessment of chondral degeneration. The presence of osteophytes in the proximal aspect of the joint was easily detected and proved to be a reliable criterion for joint degeneration. Bare areas were found at the proximal and volar attachments of the joint capsule., Conclusion: Detailed knowledge of the anatomy of the distal radioulnar joint should allow more accurate assessment of degenerative changes and localization of erosions in inflammatory joint disease. Imaging with the forearm in maximal pronation and supination can improve visualization of the cartilage of the ulnar head.

Published
2010
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33. Accessory head of biceps brachii muscle: anatomy, histology, and MRI in cadavers.

Author

Gheno R, Zoner CS, Buck FM, Nico MA, Haghighi P, Trudell DJ, and Resnick D

Subjects
Aged, Aged, 80 and over, Cadaver, Humans, Male, Middle Aged, Muscle, Skeletal abnormalities, Tendons abnormalities, Arm anatomy & histology, Magnetic Resonance Imaging methods, Muscle, Skeletal anatomy & histology, Tendons anatomy & histology
Abstract

Objective: The purpose of our study is to describe and define an anatomic variation located close to the bicipital groove using MRI with gross anatomic and histologic correlation in cadavers., Materials and Methods: Ten fresh male human shoulders were harvested and used in this investigation. They were derived from persons with a mean age of death of 78.9 years (age range, 58-92 years). MR arthrography using proton density-weighted sequences was used to obtain images in axial, coronal, and sagittal planes. After imaging, the specimens were cut in axial, coronal, and sagittal sections using a band saw. The slices were then photographed to allow correlation with the MR arthrographic images, followed by histologic analysis., Results: Two anomalous tendons, both intimate with the tendon of the long head of the biceps brachii muscle in the bicipital groove, were recognized. The origin of both tendons was in the greater tuberosity near the articular capsule. These structures had a muscular belly that was joined with the other biceps bellies. At the level of the bicipital groove, the anomalous tendons appeared as hypointense structures in proton density-weighted images, with a mostly flat morphology in axial and coronal planes. The average dimensions of these structures were 45.5 (craniocaudal)x6.2 (anteroposterior)x0.85 (mediolateral) mm., Conclusion: The MR images, gross anatomic inspection, and histologic information led us to conclude that these anomalous structures were accessory heads of the biceps brachii muscle.

Published
2010
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