Diagnosis value of MRI in acute rotator interval injury / 中国骨伤

OBJECTIVE@#To compare clinical application of 1.5 T MRI in acute rotator interval injury.@*METHODS@#Totally 160 patients with acute rotator cuff tear by clinical diagnosis were retrospectively analyzed by MRI examination and arthroscopy from March 2016 to February 2019, including 122 males and 38 females, aged from 22 to 71 years old with an average of (42.35±3.48) years old. Based on the results of arthroscopy as the gold standard, the shape and signal changes of rotator cuff, rotator interval, peripheral bursa, bone and soft tissue were observed by MRI on axial, oblique coronal and oblique sagittal imagese.@*RESULTS@#The direct MRI signs of acute rotator interval injury displayed thickening, diminution, distortion, interruption of the coracohumeral ligament and superior glenohumeral ligament complex with highsignal intensity on fat-suppression by proton weighted sequence. The indirect MRI signs displayed rotator cuff, peripheral bone and soft tissue injury. The consistency of the results between the two methods was quite satisfactory (Kappa=0.85), and the concordance rate of the two methods has statistically significant (@*CONCLUSION@#MRI could clearly display acute rotator interval, and could accurately diagnose acute rotator interval injury, which provide more accurate imaging basis for clinical diagnosis and treatment.

Diagnostic accuracy of preoperative magnetic resonance imaging for detecting subscapularis tendon tears: a diagnostic test study

ABSTRACT BACKGROUND: The accuracy of magnetic resonance imaging (MRI) for making the diagnosis of subscapularis tears presents wide variation in the literature and there are few prospective studies. OBJECTIVE: To compare the findings from MRI and arthroscopy for diagnosing subscapularis tears. DESIGN AND SETTING: Diagnostic test study performed in a tertiary care hospital. METHODS: We included patients who underwent arthroscopic rotator cuff repair and who had firstly undergone high magnetic field MRI without contrast. The images were independently evaluated by a shoulder surgeon and two musculoskeletal radiologists. Sensitivity, specificity, positive and negative predictive values, accuracy and inter and intra-observer agreement were calculated. RESULTS: MRIs on 200 shoulders were evaluated. The incidence of subscapularis tears was 69.5% (41.5% partial and 28.0% full-thickness). The inter and intra-observer agreement was moderate for detection of subscapularis tears. The shoulder surgeon presented sensitivity of 51.1% to 59.0% and specificity of 91.7% to 94.4%. The radiologists showed sensitivity of 83.5% to 87.1% and specificity of 41% to 45.9%. Accuracy ranged from 60.5% to 73.0%. CONCLUSION: The 1.5-T MRIs without contrast showed mean sensitivity of 70.2% and mean specificity of 61.9% for detection of subscapularis tears. Sensitivity was higher for the musculoskeletal radiologists, while specificity was higher for the shoulder surgeon. The mean accuracy was 67.6%, i.e. lower than that of rotator cuff tears overall.

Tendinopatía cálcica: etiopatogenia y evaluación por imágenes / Calcific tendinitis: aetiopathogenesis and imaging evaluation

Resumen: La tendinopatía cálcica es causada por el depósito patológico de cristales de hidroxiapatita de calcio en los tendones y es una causa común de dolor en las articulaciones. Afecta más frecuentemente al hombro y la cadera, con hallazgos característicos en imágenes; sin embargo, cualquier tendón puede estar involucrado. Ocasionalmente, la tendinopatía cálcica puede simular patología agresiva, como infección o neoplasia, especialmente en RM. Fisiotpatológicamente, las calcificaciones provendrían de una diferenciación anormal de las células madre del tendón, que comienzan a producir calcio, aunque todavía no es del todo claro. Los radiólogos deben estar familiarizados con los hallazgos de las imágenes para distinguir la tendinopatía cálcica de procesos más agresivos. La aspiración y lavado guiado bajo ecografía es una técnica útil realizada por el radiólogo para el tratamiento de casos sintomáticos. La familiaridad con estos procedimientos y su apariencia en imágenes es un aspecto importante en el manejo de esta enfermedad. El propósito de esta revisión es analizar la etiopatogenia de la tendinopatía cálcica, la evaluación con imágenes en los sitios de presentación más comunes y también en los menos frecuentes, así como el papel que desempeña la ecografía en el tratamiento de la patología.

Abstract: Calcific tendinitis is caused by abnormal deposition of calcium hydroxyapatite crystals in tendons and is a common cause of joint pain. The disease typically affects the shoulder and hip, with characteristic imaging findings; however, any tendon can be involved. Occasionally, calcific tendinitis can mimic aggressive disorders, such as infection and neoplasm, especially on MRI. Apparently, the calcifications come from an abnormal differentiation of the tendon stem cells, which begin to produce calcium. Radiologists should be familiar with the imaging findings to distinguish calcific tendinitis from more aggressive processes. Image-guided percutaneous needle aspiration is a useful technique performed by the radiologist for the treatment of symptomatic cases. Being familiar with these processes and their imaging appearance is an important aspect in the management of this common disease. The purpose of this review is to analyze the pathogenesis of calcium tendinopathy, the evaluation of images in both the most common and less frequent presentation sites, as well as the role played by ultrasound in the treatment of pathology.

Correlación clínica y ultrasonográfica con los hallazgos intra-operatorios de pacientes con diagnóstico de ruptura de manguito rotador en el servicio de traumatología del Hospital Obrero Nº 1, durante el periodo 2010 ­ 2014 / Clinical and ultrasonographic correlation with the intra-operative findings of patients with diagnosis of division of muff rotador in the service of traumatology of the Hospital Obrero Nº 1, during period 2010 ­ 2014

INTRODUCCIÓN: una gran parte de la población adulta padece dolor de hombro en algún momento de su vida. Dejando aparte las enfermedades neoplásicas, sistémicas y traumáticas directas, una de las causas de dolor de hombro es la patología inflamatoria o degenerativa del manguito rotador, que puede ser responsable de una limitación funcional importante adulto. OBJETIVO: determinar el grado de correlación clínica y ultrasonográfica con los hallazgos intra-operatorios en pacientes con diagnóstico de ruptura de manguito rotador en el servicio de Traumatología del Hospital Obrero Nº 1, durante el periodo 2010 ­ 2014. MATERIAL Y MÉTODOS: estudio descriptivo transversal y analítico. Se estudiaron 56 pacientes de ambos sexos, internados en el servicio de Traumatología y Ortopedia del Hospital Obrero Nº1, durante el periodo del 1° de enero del 2010 al 31 de diciembre del año 2014. Se realizó la valoración clínica (maniobra de Jobe y manobra de Yocum) y ultrasonográfica y se compararon los resultados con los hallazgos intra-operatorios, para determinar la validez y la seguridad de la clínica y la ecografía. RESULTADOS: se determina que el test diagnóstico clínico tiene mayor validez (Sensibilidad: 92,7-87,8% y Especificidad: 73,3-60%) y seguridad (Valor Predictivo Positivo: 90,5-85,7% y Valor Predictivo Negativo: 78,6-64,3%) que el test diagnóstico ultrasonográfico (Sensibilidad: 85,4%, Especificidad: 66,7%, Valor Predictivo Positivo: 87,5% y Valor Predictivo Negativo: 62,5%). CONCLUSIÓN: se determina que existe una correlación clínica y ultrasonográfica con los hallazgos intra-operatorios en pacientes con diagnóstico de ruptura de manguito rotador en el servicio de Traumatología del Hospital Obrero Nº 1

INTRODUCTION: a great part of the adult population suffers shoulder pain at some moment of life. Leaving aside direct neoplastic systems and traumatic diseases, one of the causes of pain of shoulder is the inflammatory or degenerative pathology of the muff rotator, which can result in an important functional limitation. OBJECTIVE: determining the degree of clinical and ultrasonographic correlation with the intra-operative findings in patients with yielding-point diagnosis of muff rotator in the service of Traumatology of the Hospital Obrero Nº 1, during the period 2010 ­ 2014. MATERIAL AND METHODS: cross-sectional descriptive and analytical study. 56 patients of both sexes were surveyed, inpatients in the service of Traumatology y Orthopedic of the Hospital Obrero Nº 1, during the period January 1 of 2010 to December 31 of 2014. The clinical assessment was carried out (maneuver of Jobe and maneuver of Yocum) and ultrasonographic and the results were compared with the intra operative findings, in order to determine the value and security of the clinic and the echography. RESULTS: it is determined that the diagnostic test has higher validity (Sensitivity: 92,7-87,8% and specificity: 73,3-60%) and certainty (Positive Predictive Value: 90,5-85,7% and Negative Predictive Value: 78,6-64,3%) than the diagnostic ultrasonographic test (Sensitivity: 85.4%, Specificity: 66.7%, Positive Predictive Value: 87.5% and Negative Predictive Value: 62.5%). CONCLUSIONS: it is determined that there is a clinical and ultrasonographic correlation with the intra operative findings in patients with yielding-point diagnosis of muff rotator at the service of Traumatology of the Hospital Obrero Nº 1

Estudio comparativo de la distancia coracohumeral en pacientes con patología degenerativa del subescapular y una población voluntaria asintomática / Comparative analysis of the coracohumeral distance between patients with degenerative subscapularis tendon pathology and a normal age-matched population

INTRODUCCIÓN: El pinzamiento subcoracoideo secundario a una distancia coracohumeral (DCH) disminuida, ha sido descrito como una posible etiología de las lesiones degenerativas del tendón del Subescapular (SSC), sin embargo, esa teoría aún es controversial. OBJETIVO: Evaluar si existe una diferencia significativa entre la DCH promedio de pacientes con patología degenerativa del SSC y un grupo control. MATERIALES Y MÉTODOS: Se diseñó un estudio de casos-controles y se estableció un tamaño muestral mínimo de 36 casos por grupo. De nuestra base de datos, y dentro de un periodo de 6 meses, se rescataron 46 Resonancias Magnéticas (RM) de hombro con patología degenerativa avanzada y/o roturas del SSC (grupo SSC). El grupo control fue conformado por 36 RM realizadas a voluntarios asintomáticos sin patología del mango rotador. Se incluyeron en ambos grupos solo pacientes entre 40 y 60 años. Se utilizó prueba de t para determinar las diferencias entre 2 grupos con un nivel de confianza del 95%. RESULTADOS: La edad promedio del grupo SSC fue 50,1 6,1 años y del grupo control 51,7 6,8 años, no existiendo diferencia estadísticamente significativa entre ambos (p » 0.43). La DCH promedio en el grupo SSC fue 8,58 mm [IC: 7,95­9,21 mm], y en el grupo control fue 11,04 mm [IC: 10,05­12,04 mm]. Al comparar la DCH, se encontró una diferencia estadísticamente significativa entre grupos (p » 0,00048). CONCLUSIÓN: Nuestros resultados respaldan la existencia de una asociación estadísticamente significativa entre una DCH disminuida y la presencia de patología degenerativa del SSC. NIVEL DE EVIDENCIA: III (Estudio de casos y controles).

BACKGROUND: The incidence of subscapularis tears is increasing as diagnostic imaging and arthroscopic technology improves. Decreased coracohumeral distance (CHD) with associated Subcoracoid Impingement is thought to be one, potential etiology for these lesions. OBJECTIVE: The purpose of this study was to identify the association between reduced CHD and degenerative pathology of the subscapularis tendon. METHODS: A comparative case-control study was performed. The sample size required to determine significance was calculated to be 36 cases. In total, 46 patients with severe degenerative SSC tendinopathy or subscapularis tears on magnetic resonance imaging (MR) were collected consecutively from our database (SSC group). The control group consisted of 36 asymptomatic volunteers undergoing shoulder MR. Only patients between 40 and 60 years of age were included. An independent t-test was used to determine the statistical significance between the two groups (with a 95% level of confidence). RESULTS: No statistically relevant difference was found between the average age of the two groups (50.1 6.1 and 51.7 6.8; p » 0.43). In the control group, the mean CHD was found to be 11.04 mm [CI:10.05­12.04 mm] and was 8.58 mm [CI: 7.95­9.21 mm] in the subscapularis group. The statistical analysis, comparing the CHD showed a significant difference between groups (p » 0.00048). CONCLUSION: This study supports the conclusion that degenerative subscapularis pathology is associated with narrowed coracohumeral distance, when compared with an asymptomatic age-matched group. LEVEL OF EVIDENCE: III (case-control study).

Relationship between the critical shoulder angle and the development of rotator cuff lesions: a retrospective epidemiological study / Associação entre o ângulo crítico do ombro e lesão do manguito rotador: um estudo epidemiológico retrospectivo

ABSTRACT OBJECTIVE: To perform a retrospective epidemiological study of radiographs in order to evaluate the relationship between the anatomy of the scapula and the development of rotator cuff injuries (RCIs). METHODS: This study retrospectively evaluated the relation of the critical shoulder angle (CSA) and RCIs from January 2011 to November 2013; patients were examined in the Orthopedics and Traumatology Department of a university hospital. The CSA was measured by radiographic standardization of two groups: a control group of 34 asymptomatic shoulders and a study group of 44 shoulders with complete RCIs. RESULTS: The mean age in the control group was 59.97 years (45-84) and the mean age in the group with RCIs was 59.75 years (45-84). Regarding the CSA, the control group had a mean angle of 33.59° (±3.37) and the group with RCIs had a mean angle of 39.75° (±5.35; p< 0.007). CONCLUSION: There is an association between CSA and RCIs.

RESUMO OBJETIVO: Fazer um estudo epidemiológico retrospectivo em radiografias para avaliar a relação entre a anatomia da escápula e o desenvolvimento de lesões do manguito rotador (LMR). MÉTODOS: O presente estudo avaliou retrospectivamente a relação do ângulo crítico do ombro (ACO) e LMR de janeiro de 2011 a novembro de 2013, em pacientes atendidos em um hospital universitário pelo Departamento de Ortopedia e Traumatologia. Para tanto, o ACO foi medido após a padronização radiográfica de dois grupos, um grupo controle de 34 ombros assintomáticos e um segundo grupo de 44 ombros com LMR. RESULTADOS: A média de idade no grupo controle foi de 59,97 anos (45-84) e de 59,75 anos no grupo com LMR (45-84). Em relação ao ACO, os pacientes do grupo controle tiveram média de 33,59 graus de angulação (± 3,37) e o grupo de pacientes com LMR apresentou uma média de 39,75 graus de angulação (± 5,35; p < 0,007). CONCLUSÃO: Há uma relação entre ACO e LMR.

Tendinitis cálcica del manguito rotador y su lavado por ultrasonido / Calcific tendinitis of the rotator cuff and its lavage using ultrasound

Purpose: The objective of this study is to describe the technique of lavage and aspiration of calcifications under ultrasound in patients affected by this entity and to evaluate their results in the short term. Experimental design: Retrospective, descriptive study, with approval from the Ethics Committee of the Institution. Material and Methods: We performed a retrospective search of patients who underwent lavage as well as shoulder aspiration under ultrasound for calcific tendinitis at the Clínica Alemana in Santiago. 94 patients were identified between the years 2011 and 2015, of which 23 were excluded due to incomplete data. The electronic clinical record was reviewed and the data was recorded in RedCap v6 and statistical analyzes were performed using StataSE v12. Results: The sample consisted of 71 patients, the median age being 50.1 years (IQR: 41.6-57.7) and 45.1% were women. 70.4% affected the right shoulder. The mean evolution of the symptoms was 5 months (IQR: 2-24 months). 22.5% received one or more previous infiltrations and 47.9% attended kinesiotherapy. The calcifications corresponded mainly to type 1 according to the Gartner and Heyer classification (73.3%), with a median size of 14 mm on their major axis (IQR: 10-18 mm). They affected one tendon in 74.7%, two tendons in 18.3% and three tendons in 7.0%, the supraspinatus being the tendon most frequently affected (90.1%). 85.9% presented complete or significant improvement of the symptoms, only 8.5% requiring surgical resolution with arthroscopy. The final improvement had no significant association with the Gartner and Heyer type (p= 0.3), size (p= 0.16), or with the evolution time of the symptoms (p= 0.7). Conclusions: Patients with calcific tendinitis who underwent lavage and aspiration under ultrasound had, in most cases, a significant or total resolution of the symptoms at two months follow-up, with only a minor percentage requiring arthroscopy. It was not possible to identify predictors of poor evolution for this procedure. Further studies are needed to determine its advantages over medical treatment.

Propósito: El objetivo de este estudio es describir la técnica de lavado y aspirado de calcificaciones bajo ultrasonido en pacientes afectados por esta entidad y evaluar sus resultados a corto plazo. Diseño experimental: Estudio retrospectivo, descriptivo, con aprobación del Comité de Ética de la Institución. Material y Métodos: Se realizó una búsqueda retrospectiva de los pacientes sometidos a lavado más aspirado de hombro bajo ultrasonido por tendinitis cálcica en Clínica Alemana de Santiago. Se identificaron 94 pacientes entre los años 2011 y 2015, de los cuales 23 fueron excluidos por presentar datos incompletos. Se revisó la ficha clínica electrónica y los datos fueron registrados en RedCap v6 y los análisis estadísticos se realizaron usando StataSE v12. Resultados: La muestra se compuso por 71 pacientes, siendo la mediana de edad de 50,1 años (Rango Intercuartil, RIC: 41,6-57,7) y un 45,1% correspondió a mujeres. El 70,4% afectó el hombro derecho. La evolución media de los síntomas fue de 5 meses (RIC: 2-24 meses). Un 22,5% recibió una o más infiltraciones previas y 47,9% asistió a kinesio-terapia. Las calcificaciones correspondieron principalmente al tipo 1 según la clasificación de Gartner y Heyer (73,3%), con una mediana de tamaño de 14 mm en su eje mayor (RIC: 10-18 mm). Afectaron un tendón en 74,7%, dos tendones en 18,3% y tres tendones en 7,0%, siendo el tendón más frecuentemente afectado el supraespinoso (90,1%). El 85,9% presentó mejoría completa o significativa de los síntomas, requiriendo resolución quirúrgica con artroscopía tan sólo un 8,5%. La mejoría final no tuvo asociación significativa con el tipo de Gartner y Heyer (p= 0,3), tamaño (p= 0,16), ni con el tiempo de evolución de los síntomas (p= 0,7). Conclusiones: Los pacientes con tendinitis cálcica que son sometidos a lavado y aspirado bajo ultrasonido tuvieron en su mayoría una resolución significativa o total de los síntomas a los dos meses de seguimiento, requiriendo artroscopia en un porcentaje menor. No se lograron identificar factores predictores de mala evolución de este procedimiento. Se requieren de más estudios para determinar sus ventajas por sobre el tratamiento médico.

Role of ultrasound in rotator cuff tears

The study was designed to evaluate the efficacy of ultrasound in rotator cuff tears and to compare it with MRI. Descriptive study. The study was conducted in the radiology department of Combined Military Hospital Rawalpindi from July 2005 to January 2006. Total number of patients was thirty. All of these were above thirty years of age and were referred by clinicians, with shoulder pain for diagnostic workup. Post operative patients were excluded. Ultrasound and Magnetic Resonance Imaging [MRI] were performed on each patient. Same operator performed ultrasound in all patients. Ultrasound [US] and Magnetic Resonance Imaging [MRI] detected equal number of full thickness tears while two partial thickness tears were missed on US. Hypoechoic defect was the most important primary sign while cortical irregularity and fluid in subacromial and subdeltroid busra were the most important secondary signs on US. US was equally effective to MRI in detection of rotator cuff tears. It should be the primary investigation because of its availability, cost effective and real time evaluation provided significant expertise is developed, as it is highly operator dependent

Role of ultrasound in rotator cuff tears

The objective of the study was to determine the role of ultrasound in rotator cuff tears and to calculate the sensitivity, specificity, positive and negative predictive values of ultrasonographic findings in Supraspinatus tears with magnetic resonance imaging [MRI]. Validation study. The study was conducted in the Radiology Department CMH Lahore, from April 2004 to October 2004. This study included 40 patients above 35 years of age who presented with shoulder pain and were referred for Ultrasound shoulder in Radiology Department. They were followed for their Magnetic Resonance Imaging [MRI] performed in Children Hospital. Defence National Hospital Lahore and Military Hospital Rawalpindi. Out of 40 patients 17 patients were diagnosed as having rotator cuff tears on ultrasound while 23 patients were normal. When MRI was conducted in these patients, it showed 19 rotator cuff tears while 21 patients were normal. Out of 17 patients with cuff tears on Ultrasound, 10 showed full thickness tears while 7 had partial thickness tears. Out of 19 patients with cuff tears on MRI, 11 had full thickness tears and 8 had partial thickness tears. Ultrasound should be the primary diagnostic method for shoulder pain and detection of rotator cuff tears because it is economical, noninvasive, quick and easy to perform. The MRI technique should be used secondarily because it provides more information about extent of tendons and has lower risk of artifacts

Are Shoulder Surgeons any good at Diagnosing Rotator Cuff tears using Ultrasound ? A Comparative Analysis of Surgeon vs Radiologist

High-resolution ultrasound has gained increasing popularity as an aid in the diagnosis of rotator cuff pathology. With the advent of portable machines; ultrasound has become accessible to clinicians. Aim: This study was conducted to evaluate the accuracy and reliability of ultrasound in diagnosing rotator cuff tears by a shoulder surgeon and comparing their ability to that of a musculoskeletal radiologist. Materials and Methods: Seventy patients undergoing shoulder arthroscopy for rotator cuff pathology underwent preoperative ultrasonography (US). All patients were of similar demographics and pathology. The surgeon used a Sonosite Micromax portable ultrasound machine with a 10-MHz high frequency linear array transducer and the radiologist used a 9-12 MHz linear array probe on a Siemens Antares machine. Arthroscopic diagnosis was the reference standard to which ultrasound findings were compared. Results: The sensitivity in detecting full thickness tears was similar for both the surgeon (92) and the radiologist (94). The radiologist had 100sensitivity in diagnosing partial thickness tears; compared to 85.7for the surgeon. The specificity for the surgeon was 94and 85for the radiologist. Discussion: Our study shows that the surgeons are capable of diagnosing rotator cuff tears with the use of high-resolution portable ultrasound in the outpatient setting. Conclusion: Office ultrasound; by a trained clinician; is a powerful diagnostic tool in diagnosing rotator cuff tears and can be used effectively in running one-stop shoulder clinics

MRI of the shoulder joint

The aim of this work was to study the superior level of MRI and MR arthrography for the evaluation of the shoulder joint diseases. Sixty-five patients of different ages, occupations and different complaints and clinical suspicions were included in this study, 42 were subjected to plain MRI and 38 to MR arthrography and 15 were subjected to the two examinations. It was concluded that MRI with or without arthrography was the most available imaging modality for shoulder joint disease

[Rotator cuff injury: the arthrographic aspect]

The authors report on the results of a series of 18 arthrographies of the shoulder realized in patients presenting clinical signs of rotator cuff tear; they emphasize the interest of this examination for the diagnosis and pretherapeutic evaluation of rotator cuff tear