1
|
Omae H, Yanagisawa S, Hagiwara K, Omodaka T, Hashimoto S, Kimura M, Chikuda H. Bone cysts at the meniscal attachment are associated with a longer symptom duration among patients with arthroscopically treated medial meniscus posterior root tear. Knee Surg Sports Traumatol Arthrosc 2024. [PMID: 38932618 DOI: 10.1002/ksa.12338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024]
Abstract
PURPOSE To elucidate the features of bone cysts at attachment sites of medial meniscus posterior root tears (MMPRTs). METHODS Knees treated using arthroscopic surgery for MMPRT between 2015 and 2022 were retrospectively reviewed. Patients without a memory of onset (painful popping), prior knee surgeries, concomitant ligament or meniscus injuries or fractures were excluded. Duration from onset to magnetic resonance imaging (MRI) and type of tear were evaluated during arthroscopy. On radiography, meniscus signs (cleft/ghost/giraffe neck), bone cysts at the attachment site of the MMPRT and posterior shiny-corner lesions (PSCLs; bone marrow lesions on the meniscal-covered portion of the posterior tibial plateau) were evaluated. The sensitivity and specificity of the bone cysts were assessed by comparison with matched patients who underwent arthroscopic surgery for medial meniscus posterior horn tear. In addition, subgroups (cyst-positive/cyst-negative) among patients with MMPRT were created to assess the features of bone cysts. RESULTS A total of 275 patients with MMPRT and 275 matched patients with posterior horn tears were evaluated. The sensitivity and specificity of bone cysts for MMPRT in this study were 22.2% and 98.6%, respectively. Among the 275 knees with MMPRT, compared with the cyst-negative group, the cyst-positive group had a longer duration from onset to MRI (12.9 ± 13.1 vs. 8.3 ± 10.9 weeks, respectively, p = 0.025) and reduced occurrence of PSCLs (18.0% vs. 42.0%, respectively, p = 0.031). CONCLUSION The occurrence of bone cysts at the attachment site was helpful for the accurate diagnosis of MMPRT and related to longer duration from onset to MRI and reduced PSCLs. LEVEL OF EVIDENCE Level III, cross-sectional study.
Collapse
Affiliation(s)
- Hiroaki Omae
- Department of Orthopaedic Surgery, Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan
| | - Shinya Yanagisawa
- Department of Orthopaedic Surgery, Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan
| | - Keiichi Hagiwara
- Department of Orthopaedic Surgery, Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan
| | - Takuya Omodaka
- Department of Orthopaedic Surgery, Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan
| | - Shogo Hashimoto
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Masashi Kimura
- Department of Orthopaedic Surgery, Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan
| | - Hirotaka Chikuda
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Gunma, Japan
| |
Collapse
|
2
|
Kaneko S, Hashimoto S, Honda A, Ohsawa T, Takase R, Shimada T, Chikuda H. The Usefulness of Posterior Shiny Corner Lesions in the Early Diagnosis of Medial Meniscus Posterior Root Tears. Cureus 2024; 16:e60605. [PMID: 38894800 PMCID: PMC11185192 DOI: 10.7759/cureus.60605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2024] [Indexed: 06/21/2024] Open
Abstract
INTRODUCTION Posterior shiny corner lesions (PSCLs) have been reported to be useful for the early diagnosis of medial meniscus posterior root tears (MMPRTs) in surgical patients. However, the usefulness of PSCLs in outpatients, particularly regarding the optimal timing of magnetic resonance imaging (MRI) examinations after injury, remains unknown. We hypothesized that PSCLs would normally be observed in patients with MMPRTs within one month of injury. MATERIALS AND METHODS This study included 144 patients with knee pain who visited our hospital between January 2021 and May 2023. MRI findings within and after one month were examined. Fisher's exact test was performed for PSCLs, cleft signs, ghost signs, radial tear signs, bone cysts, and medial meniscus extrusion (MME), which are findings used for the diagnosis of MMPRTs. Time-dependent receiver operating characteristic (ROC) curve analysis was performed for each MRI finding. A binomial logistic regression analysis was performed for age, sex, PSCL, ghost sign, and MME. RESULTS PSCLs were observed on 82.6% of the MRI scans within one month, but the positivity rate decreased after one month. After one month, a high percentage of patients had cleft signs and ghost signs. The results of a time-dependent ROC curve analysis showed that the PSCL had better diagnostic ability than the cleft sign, ghost sign, radial tear sign, and MME at a relatively early stage. Additionally, the area under the curve (AUC) of PSCL peaks around 35 days and then declines, reaching 0.8 or less around 40 days. On the other hand, the AUC of the cleft sign and ghost sign began to increase around 30 days after injury, and it exceeded 0.8 after approximately 100 days. The results of the binomial logistic regression analysis revealed significant PSCLs and ghost signs. Independent associations between the PSCL, or ghost sign, and the MMPRT were demonstrated. CONCLUSION This study suggests that PSCLs have a superior diagnostic capability for MMPRT during the early stages of injury compared with other MRI findings in outpatients. In particular, PSCLs have a high positivity rate within one month after injury and a high diagnostic capacity up to 40 days after injury.
Collapse
Affiliation(s)
- Soya Kaneko
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Shogo Hashimoto
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Akira Honda
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Takashi Ohsawa
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Ryota Takase
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Takeshi Shimada
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| | - Hirotaka Chikuda
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN
| |
Collapse
|
3
|
Patel V, Barakat J, Fanney L, Gendler L, Brown NJ, Ganley TJ, Nguyen JC. Maturation-dependent patterns of knee injuries among symptomatic pediatric soccer players on MRI. Skeletal Radiol 2023:10.1007/s00256-023-04543-w. [PMID: 38153433 DOI: 10.1007/s00256-023-04543-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 12/07/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023]
Abstract
OBJECTIVE To systematically investigate the prevalence of knee MRI findings among symptomatic pediatric soccer players with respect to skeletal maturity and to identify predictors of surgery. METHODS This IRB-approved, HIPAA-compliant retrospective study included soccer players (< 18 years of age) who underwent MRI examinations in the past 5 years (2018-2023). Two radiologists retrospectively and independently reviewed all examinations to categorize skeletal maturity and to identify osseous and soft tissue findings. Findings were compared between maturation groups, and logistic regression models were used to identify predictors of surgery. RESULTS Ninety-seven players (45 boys, 52 girls) included 39 skeletally immature, 21 maturing, and 37 mature knees. Kappa coefficient for interobserver reliability ranged between 0.65 and 1.00. Osgood-Schlatter disease (OSD) was more common among immature than maturing and mature knees (25% vs 14% and 5%, p = 0.04); anterior cruciate ligament (ACL) injury was more common among maturing and mature than immature knees (59% and 48%, vs 15%, p < 0.01); and meniscal tears were more common among mature than immature and maturing knees (medial, 41% vs 18% and 14%, p = 0.03; lateral, 43% vs 21% and 19%, p = 0.04). Players in the mature group were more likely to undergo surgery (p = 0.01). The presence of an effusion (OR = 19.5, 95% CI 2.8-240.9, p = 0.01), ACL injury (OR = 170.0, 95% CI 1.3-6996.9, p < 0.01), and lateral meniscal tears (OR = 10.8, 95% CI 1.8-106.1, p = 0.02) were independent predictors of surgery. CONCLUSION Differential patterns of injury were found among symptomatic pediatric soccer players; the presence of an effusion, ACL injury, and lateral meniscal tears were independent predictors of surgery, likely contributing to the higher rates of surgery among skeletally mature players.
Collapse
Affiliation(s)
- Vandan Patel
- Department of Radiology, Section of MSK, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Drexel University College of Medicine, Philadelphia, PA, USA
- Division of Orthopaedic Surgery, Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA, USA
| | - Jude Barakat
- Department of Radiology, Section of MSK, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- University of Pennsylvania School of Engineering and Applied Sciences, Philadelphia, PA, USA
| | - Lewis Fanney
- Department of Radiology, Section of MSK, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Eastern Virginia Medical School, Norfolk, VA, USA
| | - Liya Gendler
- Department of Radiology, Section of MSK, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Naomi J Brown
- Division of Orthopaedic Surgery, Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Theodore J Ganley
- Division of Orthopaedic Surgery, Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jie C Nguyen
- Department of Radiology, Section of MSK, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
| |
Collapse
|
4
|
Tyler PA, Jain V, Ashraf T, Saifuddin A. Update on imaging of the discoid meniscus. Skeletal Radiol 2022; 51:935-956. [PMID: 34546382 DOI: 10.1007/s00256-021-03910-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 02/02/2023]
Abstract
Discoid menisci represent a range of morphological meniscal variants, most commonly involving the lateral meniscus. Clinical presentation ranges from an asymptomatic incidental finding to snapping, pain, swelling and reduced range of knee movement. Symptomatic presentation of discoid menisci is usually due to meniscal tears and instability resulting from abnormal meniscal morphology and ultrastructure, with absent peri-meniscal ligamentous and meniscocapsular attachments characteristic of the Wrisberg sub-type. This article reviews the current classification systems of discoid menisci, gross morphological characteristics of each sub-type and ultrastructure. Clinical presentation, arthroscopic findings and indirect radiological diagnostic criteria are described, as are the MRI findings of normal and pathological discoid menisci. Current concepts of surgical management and outcomes of the discoid meniscus are also briefly discussed.
Collapse
Affiliation(s)
- P A Tyler
- Royal National Orthopaedic Hospital, Brockley Hill Stanmore, London, HA7 4LP, UK
| | - V Jain
- Royal National Orthopaedic Hospital, Brockley Hill Stanmore, London, HA7 4LP, UK.
| | - T Ashraf
- The Royal Orthopaedic Hospital & Queen Elizabeth University Hospital, Birmingham, UK
| | - A Saifuddin
- Royal National Orthopaedic Hospital, Brockley Hill Stanmore, London, HA7 4LP, UK
| |
Collapse
|
5
|
Morales-Avalos R, Masferrer-Pino Á, Ruiz-Chapa E, Padilla-Medina JR, Vilchez-Cavazos F, Peña-Martínez V, Elizondo-Omaña R, Perelli S, Guzmán-López S, García-Quintanilla JF, Monllau JC. MRI evaluation of the peripheral attachments of the lateral meniscal body: the menisco-tibio-popliteus-fibular complex. Knee Surg Sports Traumatol Arthrosc 2022; 30:1461-1470. [PMID: 34142172 DOI: 10.1007/s00167-021-06633-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/08/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To determine, identify and measure the structures of the menisco-tibio-popliteus-fibular complex (MTPFC) with magnetic resonance imaging (MRI) in knees without structural abnormalities or a history of knee surgery. METHODS One-hundred-and-five knees without prior injury or antecedent surgery were analyzed by means of MRI. The average age was 50.1 years ± 14.8. All the measurements were performed by three observers. The peripherical structures of the lateral meniscus body were identified to determine the location, size, and thickness of the entire MTPFC. The distance to other "key areas" in the lateral compartment was also studied and compared by gender and age. RESULTS The lateral meniscotibial ligament (LMTL) was found in 97.1% of the MRIs, the popliteofibular ligament (PFL) in 93.3%, the popliteomeniscal ligaments (PML) in 90.4% and the meniscofibular ligament (MFL) in 39%. The anteroposterior distance of the LMTL in an axial view was 20.7 mm ± 3.9, the anterior thickness of the LMTL was 1.1 mm ± 0.3, and the posterior thickness of the LMTL 1.2 mm ± 0.1 and the height in a coronal view was 10.8 mm ± 1.9. The length of the PFL in a coronal view was 8.7 mm ± 2.5, the thickness was 1.4 mm ± 0.4 and the width in an axial view was 7.8 mm ± 2.2. CONCLUSIONS The MTPFC has a constant morphological and anatomical pattern for three of its main ligaments and can be easily identified and measured in an MRI; the MFL has a lower prevalence, considering a structure difficult to identify by 1.5 T MRI.
Collapse
Affiliation(s)
- Rodolfo Morales-Avalos
- Knee Unit, Department of Orthopedic Surgery and Traumatology, University Hospital "Dr, José Eleuterio González", Universidad Autonoma de Nuevo León (U.A.N.L.), Monterrey, Nuevo León, México.,Knee and Arthroscopy Unit, ICATME, Hospital Universitari Dexeus, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain.,Departamento de Cirugía, Facultad de Medicina, Universitat Autonoma de Barcelona, (U.A.B.), Barcelona, Catalunya, Spain
| | - Ángel Masferrer-Pino
- Knee and Arthroscopy Unit, ICATME, Hospital Universitari Dexeus, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain
| | | | - José Ramón Padilla-Medina
- Knee Unit, Department of Orthopedic Surgery and Traumatology, University Hospital "Dr, José Eleuterio González", Universidad Autonoma de Nuevo León (U.A.N.L.), Monterrey, Nuevo León, México
| | - Félix Vilchez-Cavazos
- Knee Unit, Department of Orthopedic Surgery and Traumatology, University Hospital "Dr, José Eleuterio González", Universidad Autonoma de Nuevo León (U.A.N.L.), Monterrey, Nuevo León, México
| | - Víctor Peña-Martínez
- Knee Unit, Department of Orthopedic Surgery and Traumatology, University Hospital "Dr, José Eleuterio González", Universidad Autonoma de Nuevo León (U.A.N.L.), Monterrey, Nuevo León, México
| | - Rodrigo Elizondo-Omaña
- Department of Human Anatomy, School of Medicine, Universidad Autonoma de Nuevo León (U.A.N.L.), C.P. 64460, Monterrey, Nuevo León, México
| | - Simone Perelli
- Knee and Arthroscopy Unit, ICATME, Hospital Universitari Dexeus, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain.,Department of Orthopedic Surgery and Traumatology, Hospital del Mar I L'Esperança, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain
| | - Santos Guzmán-López
- Department of Human Anatomy, School of Medicine, Universidad Autonoma de Nuevo León (U.A.N.L.), C.P. 64460, Monterrey, Nuevo León, México.
| | - Juan Francisco García-Quintanilla
- Centro de Radiodiagnostico e Imagen, Monterrey, Nuevo León, México.,Department of Human Anatomy, School of Medicine, Universidad Autonoma de Nuevo León (U.A.N.L.), C.P. 64460, Monterrey, Nuevo León, México
| | - Joan Carles Monllau
- Knee and Arthroscopy Unit, ICATME, Hospital Universitari Dexeus, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain.,Departamento de Cirugía, Facultad de Medicina, Universitat Autonoma de Barcelona, (U.A.B.), Barcelona, Catalunya, Spain.,Department of Orthopedic Surgery and Traumatology, Hospital del Mar I L'Esperança, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain
| |
Collapse
|
6
|
Okazaki Y, Furumatsu T, Hiranaka T, Kintaka K, Higashihara N, Tamura M, Ozaki T. A posterior anchoring method decreases pullout suture translation of the medial meniscus posterior root repair during knee flexion. Knee 2022; 35:71-80. [PMID: 35220135 DOI: 10.1016/j.knee.2022.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/12/2021] [Accepted: 02/07/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND The medial meniscus (MM) translates posteriorly and extrudes severely from the medial tibial plateau (MTP) during knee flexion in the MM posterior root tear (PRT) knee. Transtibial pullout repair of the MMPRT has been performed to regulate MM extrusion. This study aimed to evaluate pullout suture translation during knee flexion before and after posterior anchoring during pullout repair. We hypothesized that suture translation after posterior anchoring would be significantly decreased relative to that before posterior anchoring. METHODS Thirty-five patients who underwent MM posterior root repair were prospectively investigated. Pullout repair was performed using two cinch sutures (outer and inner sutures) and posterior anchoring through the MM posterior horn and an additional bone tunnel on the MTP. The translation of the outer suture from 0° to 90° of knee flexion was measured and compared before and after posterior anchoring intraoperatively. The MM morphologic features were measured using preoperative magnetic resonance imaging, and the correlation between these values and outer suture translation was evaluated. RESULTS The average outer suture translation after posterior anchoring (1.6 ± 1.5 mm) was significantly decreased relative to that before posterior anchoring (2.5 ± 1.7 mm, P < 0.01). No significant correlations were observed between the MM morphological features and outer suture translation. CONCLUSIONS The posterior anchoring method with an MM posterior root repair is useful in decreasing posterior translation of the pullout suture during knee flexion, which might have an advantage in preventing suture pullout from the repaired MM, leading to good clinical outcomes.
Collapse
Affiliation(s)
- Yuki Okazaki
- Department of Orthopaedic Surgery, Tsuyama Chuo Hospital, 1756 Kawasaki, Tsuyama, Okayama 708-0841, Japan; Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Keisuke Kintaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Naohiro Higashihara
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Masanori Tamura
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| |
Collapse
|
7
|
Demir S, Key S, Baygin M, Tuncer T, Dogan S, Brahim Belhaouari S, Kursad Poyraz A, Gurger M. Automated knee ligament injuries classification method based on exemplar pyramid local binary pattern feature extraction and hybrid iterative feature selection. Biomed Signal Process Control 2022. [DOI: 10.1016/j.bspc.2021.103191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
8
|
MRI of the Meniscus. Clin Sports Med 2021; 40:641-655. [PMID: 34509203 DOI: 10.1016/j.csm.2021.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The menisci of the knee are accurately evaluated by MRI. Knowledge of normal anatomy, imaging parameters, imaging appearance of the normal and torn meniscus, and common anatomic variants and pitfalls are essential in obtaining the correct imaging diagnosis. There are multiple imaging signs of meniscal tear, including linear signal intensity extending to an articular surface on at least 2 images, altered meniscal shape, displaced meniscal flap, ghost meniscus, meniscal extrusion, and parameniscal cyst. After surgery, granulation tissue may mimic tear. Diagnosis is improved by comparison to preoperative images, operative note, and intra-articular contrast administration.
Collapse
|
9
|
Lateral Meniscus Posterior Root Injury: MRI Findings in Children With Anterior Cruciate Ligament Tear. AJR Am J Roentgenol 2021; 217:984-994. [PMID: 33728972 DOI: 10.2214/ajr.21.25554] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND. Undiagnosed and unrepaired root tears are increasingly recognized as a preventable cause of accelerated osteoarthritis. Preoperative MRI findings of lateral meniscus posterior root tears in children with concomitant anterior cruciate ligament (ACL) injury are not well described. OBJECTIVE. The purpose of this study was to investigate the performance of preoperative MRI for identifying concomitant lateral meniscus posterior root injuries in pediatric patients with ACL tears with arthroscopy as the reference standard. METHODS. Consecutively registered children who underwent MRI within 90 days before arthroscopic primary ACL reconstruction between March 2017 and December 2019 were included. Two radiologists assessed MRI examinations for direct signs involving the root proper and for findings associated with lateral meniscus posterior root tears. Kappa coefficients for MRI findings were computed. Findings in patients with root tears and intact roots were compared by independent-samples t test, Mann-Whitney U test, chi-square test, Fisher exact test, and multivariable logistic regression analysis. RESULTS. At arthroscopy, 39 children (18 boys, 21 girls; mean age, 15.2 ± 1.4 years) had lateral meniscus posterior root tears; 51 (22 boys, 29 girls; mean age, 15.7 ± 1.8 years) had intact roots. Kappa coefficients ranged from 0.65 to 0.92, aside from tears involving the entheseal segment (κ = 0.55) or popliteomeniscal fascicles (κ = 0.45). MRI findings that were predictors of arthroscopically diagnosed root tear (p < .05) were lateral meniscus root tear in any segment (odds ratio [OR], 16.8; 95% CI, 5.6-50.1), degeneration in any segment (OR, 3.9; 95% CI, 1.6-9.6), coronal cleft sign (OR, 5.7; 95% CI, 2.0-16.7), sagittal ghost sign (OR, 4.8; 95% CI, 1.2-19.1), and axial radial defect sign (OR, 7.1; 95% CI, 2.4-20.5). Tear involving any segment of the root proper had the highest PPV, 82%, with 79% NPV. The coronal cleft, sagittal ghost, and axial radial defect signs had specificities of 88%, 94%, and 88% but sensitivities of 44%, 23%, and 49%. The only significant independent predictor on preoperative MRI was root tear in any segment (OR, 15.8; 95% CI, 2.7-137.5; p = .003). CONCLUSION. Among MRI findings evaluated for preoperative diagnosis of lateral meniscus posterior root tear, tear involving any segment of the root proper had the strongest performance; associated findings had high specificity but low sensitivity. CLINICAL IMPACT. Accurate identification of lateral meniscus posterior root tears on preoperative MRI can aid in operative planning and reduce treatment delay.
Collapse
|
10
|
Abstract
This article highlights five knee injuries that, in the author's experience, are commonly overlooked by readers inexperienced in knee MRI: ramp lesions, meniscocapsular tears, meniscal root ligament tears, posterior capsular ligament tears, and partial anterior cruciate ligament tear. While these injuries are readily apparent when the images are assessed for the given abnormality, the author's belief is that these may be overlooked because either the injury is not considered, or the affected area is not closely inspected. While these injuries may not alter immediate clinical management or require surgical intervention, they may, nevertheless, result in patient symptoms and may potentially increase the risk of further knee injury. Further, these injuries are difficult to recognize clinically and arthroscopically. In this review, we present these five injuries, emphasising relevant anatomy, normal MRI appearances, common injury patterns, and tips to avoid their being overlooked. Routine review of these areas when interpreting knee MRI, with additional imaging as necessary, will allow these injuries to be recognized more regularly.
Collapse
|
11
|
Okazaki Y, Furumatsu T, Kajiki Y, Hiranaka T, Kintaka K, Kodama Y, Kamatsuki Y, Ozaki T. A posterior shiny-corner lesion of the tibia is observed in the early phase after medial meniscus posterior root tear. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2021; 32:301-306. [PMID: 33846879 DOI: 10.1007/s00590-021-02968-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/29/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUNDS Medial meniscus (MM) posterior root tear (PRT) results in joint overloading and degenerative changes in the knee, and pullout repair is recommended to prevent subsequent osteoarthritis. Diagnosing MMPRT is sometimes difficult, especially in the case of an incomplete tear. A posterior shiny-corner lesion (PSCL) is reported to be useful for diagnosis, although the association between MMPRT and PSCL is unknown. This study aimed to investigate the properties of PSCL, such as the location, volume, and duration from injury to the time of MRI (duration). We hypothesized that PSCL is observed in the early phase after the MMPRT onset. METHODS T2-weighted fat-suppression magnetic resonance imaging (MRI) was obtained from 55 patients with MMPRT preoperatively. The prevalence of the PSCL; giraffe neck, cleft, and ghost signs; severe MM extrusion (> 3 mm); and the PSCL volume were evaluated. The PSCL lesion elliptical volume (mm3) was calculated by measuring the anteroposterior, transverse, and craniocaudal dimensions. RESULTS PSCL was observed in 34 (62%) cases. The mean volume of the PSCL was 102.0 mm3. A significantly shorter duration was observed in the PSCL-positive group (5.6 weeks) than that in the PSCL-negative group (40.9 weeks, P < 0.01), although no significant correlation was observed between the PSCL volume and duration. The sensitivity for the MMPRT was 90.5% when the cut-off duration value was 3 weeks and 81.8% when the cut-off value was 8 weeks. CONCLUSIONS MRI examination may detect PSCL if it is performed early following MMPRT onset. Detecting PSCL may be useful in diagnosing MMPRT with high sensitivity.
Collapse
Affiliation(s)
- Yuki Okazaki
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.,Department of Orthopaedic Surgery, Kosei Hospital, Okayama, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
| | - Yuya Kajiki
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Keisuke Kintaka
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Yuya Kodama
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.,Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, USA
| | - Yusuke Kamatsuki
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| |
Collapse
|