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Medicine (Baltimore) 2019 Apr;98(15):e15182

Department of Orthopedics, Third Hospital of Hebei Medical University,People's Republic of China.

Rationale: Discoid meniscus is an anatomical congenital anomaly more often found in the lateral meniscus. A discoid medial meniscus is a very rare anomaly, and it is difficult to diagnose a bilateral discoid medial meniscus because not all the discoid medial menisci are symptomatic. Herein, we report 2 cases of bilateral discoid medial meniscus. Read More

Diagn Interv Imaging 2019 Apr 28;100(4):243-249. Epub 2019 Mar 28.

UMR-S970, Department of Radiology, Hôpital Européen Georges-Pompidou, Assistance Publique-Hôpitaux de Paris, Université Paris-Descartes, 75015 Paris, France; Laboratoire de Recherche en Imagerie, LRI, PARCC-HEGP, UMR 970, Inserm/université Paris Descartes, Sorbonne-Paris cité, 75015 Paris, France.

Purpose: The purpose of this study was to build and evaluate a high-performance algorithm to detect and characterize the presence of a meniscus tear on magnetic resonance imaging examination (MRI) of the knee.

Material And Methods: An algorithm was trained on a dataset of 1123 MR images of the knee. We separated the main task into three sub-tasks: first to detect the position of both horns, second to detect the presence of a tear, and last to determine the orientation of the tear. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Mar 26. Epub 2019 Mar 26.

Sports Surgery Clinic, Dublin, Ireland.

Purpose: To evaluate whether medial-sided bone bruising was associated with postero-medial meniscal tears in patients with an acute rupture of their anterior cruciate ligament (ACL).

Methods: A retrospective analysis of 150 consecutive patients who had an MRI scan within 8 weeks of their ACL rupture that underwent an ACL reconstruction was performed. Based on the intra-operative findings, two groups were identified: Group A (N = 75) had no postero-medial meniscal tear associated with the acute ACL rupture and Group B (N = 75) had a postero-medial meniscal tear found at time of reconstruction. Read More

Orthop J Sports Med 2019 Mar 12;7(3):2325967119830381. Epub 2019 Mar 12.

Department of Orthopaedics, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA.

Background: Bone marrow lesions (BMLs) have been found on magnetic resonance imaging in patients with meniscal tears.

Purpose: We sought to determine the prevalence and location of BMLs, the association between BMLs and chondral lesions, and the association between BMLs and pain in patients without radiographic evidence of degenerative joint disease who underwent arthroscopic partial meniscectomy (APM).

Study Design: Cohort study; Level of evidence, 2. Read More

Medicine (Baltimore) 2019 Mar;98(11):e14851

Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu.

Purpose: To investigate whether single femoral, single tibial tunnel anatomic double-bundle anterior cruciate ligament (ACL) reconstruction is equal to or superior to double femoral, double tibial tunnel ACL double-bundle anatomic reconstruction in terms of restoring the stability and functions of the knee joint.

Methods: A prospective clinical study was performed to compare 30 cases of single-tunnel ACL double-bundle anatomic reconstruction to 28 cases of double-tunnel ACL double-bundle anatomic reconstruction, with average follow-up of 36 months. All graft tendons were hamstring tendon autografts. Read More

J Orthop Surg Res 2019 Feb 12;14(1):44. Epub 2019 Feb 12.

Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design (SUTD), 8 Somapah Road, Singapore, 487372, Singapore.

Background: Patients undergoing total or partial arthroscopic meniscectomy for treating traumatic meniscal tears are at greater risk of developing knee osteoarthritis (OA) due to increased mechanical load. The purpose of this study was to evaluate the effects of a valgus unloader brace in the medial meniscectomized knee joint during the gait cycle.

Methods: A three-dimensional finite element model of the knee joint was developed using the substructures segmented from magnetic resonance images. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Feb 8. Epub 2019 Feb 8.

OrthoDent, Shenoy Nagar, Chennai, India.

Purpose: Traditionally, MRI has not been used to predict meniscus tear reparability. An attempt has been made in this study to predict meniscal reparability using MRI, and a new scoring system to help with the same has been developed and tested.

Methods: Thirty repaired menisci were compared with equal number of meniscectomy cases retrospectively. Read More

Arthroscopy 2019 Feb;35(2):554-562.e13

Medical Device Consultants of Ridgewood, Ridgewood, New Jersey, U.S.A.. Electronic address:

Purpose: To determine whether needle arthroscopy (NA) compared with magnetic resonance imaging (MRI) in the diagnosis and treatment of meniscal tears is cost-effective when evaluated over a 2-year period via patient-reported outcomes. The hypothesis is that improved diagnostic accuracy with NA would lead to less costly care and similar outcomes.

Methods: A Markov model/decision tree analysis was performed using TreeAge Pro 2017 software. Read More

Orthop J Sports Med 2019 Jan 10;7(1):2325967118820057. Epub 2019 Jan 10.

Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.

Background: An altered tibial position is still present despite anterior cruciate ligament (ACL) reconstruction. It has been demonstrated that an abnormal tibial position after an ACL injury may play a role in subsequent injuries to the meniscus, which can lead to early cartilage degeneration.

Purpose: To determine changes in both the tibial position and the meniscal matrix present before and after ACL reconstruction as well as to evaluate the association between these 2 variables in ACL-injured knees 3 years after reconstruction. Read More

Folia Morphol (Warsz) 2019 Jan 21. Epub 2019 Jan 21.

Department of Radiology, Isotopic Diagnostic and Therapy, Military Medical Academy Teaching Hospital- Central Veteran Hospital, Zeromskiego 113 Street, 90-549 Lodz, Poland.

Evaluation with magnetic resonance imaging (MRI) is currently a gold standard for comprehensive posttraumatic assessment of the knee joint. Increasing availability of MR systems with stronger magnetic fields and new sequences results in higher resolution of images and thus allows imaging smaller and finer anatomical details, including different anatomical variations. This article focuses on anatomical variations of knee ligaments, which can mimics pathological structures. Read More

Am J Sports Med 2019 Mar 17;47(3):612-619. Epub 2019 Jan 17.

Investigation performed at Brigham and Women's Hospital, Boston, Massachusetts, USA.

Background:: Arthroscopic partial meniscectomy (APM) is used to treat meniscal tears, although its efficacy is controversial.

Purpose:: This study used magnetic resonance imaging (MRI) to determine characteristics that lead to greater benefit from APM and physical therapy (PT) than from PT alone among patients with meniscal tear and knee osteoarthritis.

Study Design:: Cohort study; Level of evidence, 2. Read More

J Pediatr Orthop 2019 Jan 8. Epub 2019 Jan 8.

Elite Sports Medicine, Connecticut Children's Medical Center.

Background: Prior research has shown decreased accuracy of meniscal injury detection using magnetic resonance imaging (MRI) for anterior cruciate ligament (ACL)-deficient adult patients as well as ACL-deficient pediatric and adolescent patients. The objectives of this study were the following: (1) assess the diagnostic ability of MRI in detecting meniscal injuries for pediatric and adolescent patients undergoing arthroscopic ACL reconstruction and (2) characterize the unrecognized meniscal injuries.

Methods: The sensitivity, specificity, positive predictive value, and negative predictive value of meniscal tears (medial, lateral, or both) on MRI were calculated for the 107 patients in this cohort. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Jan 3. Epub 2019 Jan 3.

Klinik für Orthopädie und Unfallchirurgie, Martin Luther Krankenhaus, Berlin, Germany.

Purpose: Extrusion of the medial meniscus evaluated on magnetic resonance imaging (MRI) has been described as indirect radiological sign for meniscus root tears. However, ultrasound detectable dynamic extrusion is observed in normal physiological settings. The aim of the present study was to analyze the dynamic meniscal extrusion using ultrasound (US) examination in patients with MRI-confirmed meniscal root tears. Read More

Br J Hosp Med (Lond) 2019 Jan;80(1):46-50

Honorary Professor Edge Hill University, and Consultant Hip and Knee Orthopaedic Surgeon, Department of Orthopaedic Surgery, Wrightington and Lancashire Teaching Hospitals, Wigan.

Meniscal injuries are among the most common orthopaedic injuries seen in knee clinics. Meniscal tears can occur as a result of acute injuries or chronic degeneration. However, the exact incidence of meniscal tears is difficult to ascertain because of the high number of asymptomatic tears and the high rate of degenerative tears in patients with advanced degenerative joint disease. Read More

Artif Intell Med 2018 Dec 4. Epub 2018 Dec 4.

Computer Engineering Department, Yıldız Technical University, İstanbul, Turkey. Electronic address:

Menisci are structures that directly affect movement, so early detection of meniscus tears also helps to prevent progressive knee disorders such as osteoarthritis. Manual segmentation of the menisci and diagnosis of the meniscal tear is a costly process in terms of time and effort for a radiologist. The aim of this study is to automatically determine the location and the type of meniscal tears that are important in the diagnosis and effective treatment of this problem. Read More

BMC Musculoskelet Disord 2018 Dec 1;19(1):429. Epub 2018 Dec 1.

Orthopaedic and Arthritis Center for Outcomes Research (OrACORe) and Policy and Innovation eValuation in Orthopedic Treatments (PIVOT), Department of Orthopaedic Surgery, Brigham and Women's Hospital, 60 Fenwood Road, BTM 5016, Boston, MA, 02115, USA.

Background: Meniscal tears often accompany knee osteoarthritis, a disabling condition affecting 14 million individuals in the United States. While several randomized controlled trials have compared physical therapy to surgery for individuals with knee pain, meniscal tear, and osteoarthritic changes (determined via radiographs or magnetic resonance imaging), no trial has evaluated the efficacy of physical therapy alone in these subjects.

Methods: The Treatment of Meniscal Tear in Osteoarthritis (TeMPO) Trial is a four-arm multi-center randomized controlled clinical trial designed to establish the comparative efficacy of two in-clinic physical therapy interventions (one focused on strengthening and one containing placebo) and two protocolized home exercise programs. Read More

Medicine (Baltimore) 2018 Nov;97(48):e13443

Department of Radiology, Research Institute of Radiological Science, YUHS-KRIBB, Medical Convergence Research Institute, and Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul.

The objectives of this study were to compare the ultrashort T2* relaxation time with the T2* relaxation time using the 3 dimensional (3D) cones sequence in 3 groups of patients with normal, degenerated, and torn knee menisci, and to demonstrate the additional effect of the ultrashort echo time (UTE) signal intensity.Following institutional review board approval, 42 knee magnetic resonance imaging (MRI) scans of 42 patients who presented with knee pain and underwent knee MRIs, with the 3D Cones of UTE sequence (minimum TEs: 32 μs) and a 3T MRI scanner (Discovery 750, GE Healthcare, Waukesha, WI), were analyzed. The enrolled patients were classified into 3 subgroups:normal meniscus on conventional MRI, with no positive meniscus-related physical examination in medical records;meniscal degeneration with signal changes on conventional MRI; andmeniscal tear. Read More

Int J Surg Case Rep 2018 22;53:372-376. Epub 2018 Nov 22.

Department of Orthopaedic Surgery, Hoshigaoka Medical Center, 4-8-1, Hoshigaoka, Hirakata, Osaka, 573-8511, Japan. Electronic address:

Introduction: Treatment of a horizontal tear of a complete discoid lateral meniscus (DLM) is still controversial. Preserving peripheral rim as a normal shape of the meniscus with single-leaf resection is a conventional treatment, however meniscal function could not be fully restored.

Presentation Of Case: A 28-year old woman and a 34-year old woman experienced knee pain and had restricted knee extension. Read More

PLoS Med 2018 11 27;15(11):e1002699. Epub 2018 Nov 27.

Department of Radiology, Stanford University, Stanford, California, United States of America.

Background: Magnetic resonance imaging (MRI) of the knee is the preferred method for diagnosing knee injuries. However, interpretation of knee MRI is time-intensive and subject to diagnostic error and variability. An automated system for interpreting knee MRI could prioritize high-risk patients and assist clinicians in making diagnoses. Read More

J Knee Surg 2018 Nov 16. Epub 2018 Nov 16.

Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan.

The incidence of meniscal tear was reported to increase with the delay of anterior cruciate ligament reconstruction (ACLR). The tear may occur concurrently with the ACL injury or after the ACL injury. Few studies had focused on the patients whose meniscus is intact during ACL injury. Read More

Folia Morphol (Warsz) 2018 Oct 29. Epub 2018 Oct 29.

Department of Histology and Embryology, Faculty of Medicine, Dicle University, Diyarbakır, Turkey.

A meniscus tear is a serious trauma that develops during swinging motion of the fixed foot. Meniscus tears may also be accompanied by divergence of the lateral ligaments of the knee joint. We enrolled 45 males and 35 females with meniscal tears in the present study. Read More

Acta Med Okayama 2018 Oct;72(5):493-498

Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan.

Medial meniscus (MM) posterior root tear (PRT) results in joint overloading and degenerative changes in the knee. MM root repair is recommended to prevent subsequent cartilage degeneration following MMPRT. Favorable clinical outcomes have been reported after transtibial pullout repair of MMPRT. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Mar 23;27(3):905-911. Epub 2018 Oct 23.

CHU Toulouse, Hôpital des enfants, 330 Avenue de Grande Bretagne, TSA 70034, 31059, Toulouse cedex 9, France.

Purpose: The purpose of this study was to identify epidemiologic risk factors for secondary meniscal tears in paediatric and adolescent patients who sustain an anterior cruciate ligament (ACL) tear. The hypothesis was that delayed reconstruction and elevated BMI z score, increase the risk for secondary meniscal tears.

Methods: A prospective, descriptive and analytical study of consecutively accrued children and adolescents with an ACL tear was performed. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Feb 4;27(2):590-595. Epub 2018 Oct 4.

Department of Orthopaedic Surgery, Henry Ford Health System, Henry Ford Hospital, 2799 W. Grand Blvd, Detroit, MI, 48202, USA.

Purpose: The purpose of this study was to identify if abnormal tibial alignment was a risk factor for lateral meniscus posterior root tears (LMPRT) in patients with acute anterior cruciate ligament (ACL) ruptures.

Methods: The medical charts of 200 patients treated for ACL ruptures between 2013 and 2016 were retrospectively reviewed and evaluated. MRI images and reports were assessed for concurrent meniscal tears. Read More

JAMA 2018 10;320(13):1326-1327

Department of Orthopedic Surgery, New York University School of Medicine, New York.

Knee Surg Sports Traumatol Arthrosc 2019 Mar 29;27(3):898-904. Epub 2018 Sep 29.

Metin Sabancı Baltalimanı Kemik Hastalıkları Eğitim ve Araştırma Hastanesi, Istanbul, Turkey.

Purpose: The purpose of this study was to evaluate the role of surgeons' experience with meniscal repairs and meniscectomy decisions, and to determine the factors affecting the disagreement between meniscal repairs and meniscectomy decisions.

Methods: In total, 223 patients with meniscal tears, 106 meniscal repairs, and 117 meniscectomies were included. Six orthopedic surgeons (3: > 5 years; 3: < 5 years' arthroscopy experience) were blinded, and they independently reviewed all preoperative MR images for over a month. Read More

Ochsner J 2018 ;18(2):126-130

Department of Orthopedics, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA.

Background: Primary care physicians often encounter patients with knee pain and are faced with the dilemma of whether to refer patients to a specialist. Meniscal tears are the most common intraarticular knee injury but are challenging to accurately diagnose because of a lack of quantitative, accurate, and easy-to-administer tests. We conducted a retrospective medical record review to evaluate whether measurement of knee range of motion (ROM) via goniometry could discriminate between healthy and meniscus-altered knees. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Feb 24;27(2):361-368. Epub 2018 Sep 24.

Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan.

Purpose: The purpose of this study was to evaluate the shape and shift of the medial meniscus before and after meniscal repair concurrent with anterior cruciate ligament (ACL) reconstruction using magnetic resonance imaging (MRI) at 90° of knee flexion.

Methods: This study included 18 patients with ACL-deficient knees without meniscus tears (group A), 11 patients with medial meniscus tears alone (group M), and 15 patients with ACL-deficient knees complicated with medial meniscus tears (group AM). The posterior segment shape was evaluated using open MRI at 90° of knee flexion preoperatively and at 3 months postoperatively. Read More

Indian J Orthop 2018 Sep-Oct;52(5):513-521

Department of Orthopaedic Surgery and Rehabilitation Medicine, State University of New York (SUNY), Downstate Medical Center, Brooklyn, NY, USA.

Pediatric intrasubstance anterior cruciate ligament (ACL) tears have a significant epidemiologic impact as their numbers continue to grow globally. This review focuses on true pediatric intrasubstance ACL tears, which occur >400,000 times annually. Modifiable and non-modifiable risk factors include intercondylar notch width, ACL size, gender, landing mechanisms, and hormonal variations. Read More

Orthop Traumatol Surg Res 2018 Dec 17;104(8S):S169-S173. Epub 2018 Sep 17.

15, rue Ampère, 92500 Rueil-Malmaison, France.

Introduction: The last symposium held by the French Arthroscopy Society was on anterior cruciate ligament (ACL) reconstruction on children. The first aim of this study was to analyse the tolerance of conservative management of ACL rupture in children. We also tried to find predictive factors of ACL reconstruction. Read More

Biomed Res Int 2018 29;2018:5353820. Epub 2018 Jul 29.

Department of Pediatric Orthopaedic Surgery, Children's Hospital, Hamburg-Altona, Germany.

Background: The influence of increasing lateral plateau widening on the frequency of meniscal and ligamentous lesions in lateral tibial plateau fractures has been examined in very few studies using plain radiographs. Because the amount of this parameter cannot be measured accurately on plain radiographs, the purpose of this survey was to look for a possible correlation between the extent of lateral plateau widening, as measured on multidetector CT (MDCT) scans, and different soft-tissue injuries determined from magnetic resonance imaging (MRI).

Materials And Methods: 55 patients with a lateral tibial plateau fracture were included in this retrospective case series. Read More

J Magn Reson Imaging 2018 Aug 24. Epub 2018 Aug 24.

Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.

Background: Ten-minute MRI of the pediatric knee can add value through increased cost-effectiveness and decreased sedation needs but requires validation of its clinical efficacy.

Purpose: To determine the arthroscopy-based diagnostic accuracy and interreader reliability of 10-min 3D Controlled Aliasing In Parallel Imaging Results In Higher Acceleration (CAIPIRINHA) turbo spin echo (TSE) MRI with two isotropic pulse sequences for the diagnosis of internal derangement in children with painful knee conditions.

Study Type: Prospective. Read More

Semin Musculoskelet Radiol 2018 Sep 22;22(4):386-397. Epub 2018 Aug 22.

Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California.

Anterior cruciate ligament (ACL) tears are common injuries that if left untreated can result in chronic instability, cartilage damage, meniscal tears, and ligamentous injuries, eventually leading to early osteoarthritis. ACL reconstruction surgeries are therefore increasingly being performed. Despite the fact that most patients achieve excellent postoperative results, patients can present with recurrent instability and pain. Read More

Am J Sports Med 2018 Oct 20;46(12):2894-2898. Epub 2018 Aug 20.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.

Background: Database research is being used in orthopaedic literature with increased regularity. The main limitation of database research is the absence of diagnosis and treatment verification afforded by medical chart review. This absence may limit the accuracy of some conclusions and recommendations produced by database research. Read More

Invest Radiol 2018 11;53(11):689-697

Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD.

Objectives: The aim of this study was to test the hypothesis that magnetic resonance imaging (MRI) of the knee with 10-minute 3-dimensional (3D) controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA) sampling perfection with application optimized contrast using different flip angle evolutions (SPACE) turbo spin echo (TSE) protocols can replace 20-minute 2-dimensional (2D) TSE standard-of-reference protocols for the diagnosis of internal derangement.

Materials And Methods: After internal review board approval and prospective informed consent, 100 symptomatic subjects underwent MRI of the knee at 3 T and 50 symptomatic subjects at 1.5 T, consisting of 10-minute 3D CAIPIRINHA SPACE TSE and 20-minute standard-of-reference 2D TSE protocols. Read More

J Knee Surg 2018 Aug 1. Epub 2018 Aug 1.

Department of Orthopaedic Surgery, National University Hospital Sports Centre, National University Health System, Singapore.

Females are well known to have a two to nine times increase in relative risk of anterior cruciate ligament (ACL) rupture as compared with males. However, there is limited literature available regarding the rates of associated intra-articular and extra-articular injuries associated with ACL ruptures. The purpose of this study was to investigate the gender differences in intra-articular and extra-articular injuries associated with ACL ruptures in an acute setting. Read More

J Med Ultrasound 2017 Jul-Sep;25(3):167-172. Epub 2017 Aug 17.

University of California-Irvine, Dept of Emergency Medicine, USA.

Background: Ultrasound has become an increasingly utilized tool for the imaging of the musculoskeletal system, especially for imaging the components of the knee. Even though MRI is touted as being the golden standard for identifying knee pathologies, the use of ultrasound has gained popularity in this field given its ability for rapid diagnosis. This study aims to investigate the efficacy of point-of-care ultrasound (POCUS) to diagnose injuries to the medial knee compartment when compared to magnetic resonance imaging (MRI). Read More

AJR Am J Roentgenol 2018 Oct 31;211(4):880-886. Epub 2018 Jul 31.

1 Department of Radiology, Boston University School of Medicine, 820 Harrison Ave, FGH Bldg 3rd Fl, Boston, MA 02118.

Objective: The purpose of this article is to describe knee abnormalities and the occurrence of MRI-detected sports-related knee abnormalities by evaluating MRI examinations performed during the Rio de Janeiro Olympic Games held in August 2016.

Conclusion: There were 11,274 athletes at the Rio 2016 Olympic Games, and 113 of them underwent at least one knee MRI in the Olympic Village. Cartilage abnormalities, followed by meniscal tears and ligament sprains, were the most frequent abnormalities. Read More

Am J Sports Med 2018 Aug 16;46(10):2376-2383. Epub 2018 Jul 16.

Department of Orthopaedic Sports Medicine, Hospital Rechts der Isar, Technical University of Munich, Munich, Germany.

Background: Septic arthritis (SA) of the knee after anterior cruciate ligament reconstruction (ACLR) is a rare but potentially devastating condition. In certain cases, graft removal becomes necessary.

Purpose: To evaluate clinical, subjective, and radiologic outcomes of patients with SA after ACLR and assess whether graft retention has superior clinical results as compared with graft removal. Read More

Arch Orthop Trauma Surg 2018 Dec 5;138(12):1725-1730. Epub 2018 Jul 5.

Department of Orthopedic Surgery, Inje University Busan Paik Hospital, Busan, South Korea.

Introduction: Little is known about peripheral rim instability (PRI) of adult discoid lateral meniscus (DLM). We compared PRI of the intact DLM (iDLM) to those of intact normal lateral meniscus (LM) in adult patients and also investigated whether there was any association between PRI and DLM tears.

Materials And Methods: We investigated PRI in 17 DLMs and 60 normal LMs without tears during arthroscopic surgery for medial compartmental pathologies between June 2012 and October 2015. Read More

BMJ Case Rep 2018 Jun 20;2018. Epub 2018 Jun 20.

Department of Orthopedics- Traumatology, Thammasat University Hospital, Pathumtani, Thailand.

Posterior root medial meniscus (PRMM) tears have shown to be biomechanically equivalent to complete meniscectomy. Drawbacks from PRMM tears repair are unsatisfactory healing rates. In this case report, we outlined a PRMM reconstruction with gracilis graft healing outcome in chronic PRMM tear case, based on clinical and MRI evaluation. Read More

Br J Sports Med 2018 Jun 9. Epub 2018 Jun 9.

La Trobe Sports and Exercise Medicine Research Centre, School of Allied Health, La Trobe University, Bundoora, Victoria, Australia.

Background: Knee MRI is increasingly used to inform clinical management. Features associated with osteoarthritis are often present in asymptomatic uninjured knees; however, the estimated prevalence varies substantially between studies. We performed a systematic review with meta-analysis to provide summary estimates of the prevalence of MRI features of osteoarthritis in asymptomatic uninjured knees. Read More

Knee Surg Sports Traumatol Arthrosc 2018 Dec 5;26(12):3731-3737. Epub 2018 Jun 5.

St Michael's Hospital, 30 Bond Street, Toronto, ON, M5B 1W8, Canada.

Purpose: The frequency of meniscal root tears in association with multi-ligament knee injury has not been established but adds to the complexity of surgical reconstruction and may have long-term consequences. Therefore, identifying root tears, on preoperative imaging, is important. The aim of this study was to identify the frequency of meniscal root tears, on preoperative magnetic resonance imaging, following multi-ligament injury and distinguish associated injury patterns that may aid detection. Read More

Eur Radiol 2018 Nov 22;28(11):4696-4704. Epub 2018 May 22.

Department of Radiology and Nuclear Medicine, University Hospital Basel, Petersgraben 4, 4031, Basel, Switzerland.

Objectives: To assess the relationship of subchondral bone tracer uptake (BTU) on SPECT/CT and meniscal pathologies on MRI in patients with painful knees.

Methods: Twenty-five patients who had MRI and SPECT/CT within 3 months without knee surgery or grade ≥3 cartilage lesions were prospectively included. Maximum values of each subchondral femorotibial area were quantified and a ratio was calculated in relation to a femoral shaft reference region, which represented the BTU background activity. Read More

Orthop J Sports Med 2018 Apr 24;6(4):2325967118767625. Epub 2018 Apr 24.

Division of Sports Medicine and Surgery, Department of Orthopaedic Surgery, National University Hospital, National University Health System, Singapore.

Background: Anterior cruciate ligament (ACL) injuries are frequently associated with bone bruises, and their presence may be associated with concomitant intra- and extra-articular injuries.

Purpose: To investigate the prevalence and pattern of distribution of bone bruises in patients with acute ACL tears from noncontact sports trauma and their association with specific intra- and extra-articular injuries.

Study Design: Cross-sectional study; Level of evidence, 3. Read More

Orthopedics 2018 May 9;41(3):e442-e444. Epub 2018 May 9.

Displaced parrot beak flap tears in the meniscotibial recess are complex tears of the meniscus that begin as central radial tears and progressively extend toward the periphery, creating a detached fragment. These tears have not been described in the literature, but the authors have described them as the "meniscal comma sign" based on their appearance on magnetic resonance imaging. Displaced fragments are clinically significant because of the pain and mechanical symptoms they can cause as a result of tenting of the deep medial collateral ligament. Read More

Arthritis Care Res (Hoboken) 2019 Mar;71(3):385-389

Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.

Objective: Synovitis is a prevalent feature in patients with knee osteoarthritis (OA) and meniscal tear and is associated with pain and cartilage damage. Patient-reported swelling is also prevalent in this population. The aim of this study was to investigate the cross-sectional association between patient-reported swelling and effusion-synovitis detected by magnetic resonance imaging (MRI) in patients with OA and meniscal tear. Read More

Medicine (Baltimore) 2018 May;97(18):e0624

Medical Imaging Research Institute, Department of Radiology, School of Medicine, Binzhou Medical University, Yantai, Shandong, China.

Background: This study aimed to describe clearly the normal imaging features of the meniscal roots on the magnetic resonance imaging (MRI) with a 3-dimensional (3D) proton density-weighted (PDW) sequence at 3T.

Methods: A total of 60 knees of 31 young asymptomatic volunteers were examined using a 3D MRI. The insertion patterns, constitution patterns, and MR signals of the meniscal roots were recorded. Read More

Eur J Radiol 2018 May 6;102:115-124. Epub 2018 Mar 6.

Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, United States. Electronic address:

The menisci play an important role in knee kinematics. Their unique anatomy allows them to channel forces generated during knee movements through the larger tibio-femoral condylar surfaces while simultaneously resisting deleterious hoop stresses. Although physiologic meniscal extrusion occurs with every knee joint movement, pathologic meniscal extrusion subjects the knee to persistent and excessive load transmission. Read More

Zhongguo Gu Shang 2018 Mar;31(3):263-266

Department of Joint Surgery, the Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang, China;

Objective: To explore diagnostic value of MRI on posterior root tear of medial and lateral meniscus.

Methods: From January 2012 to January 2016, clinical data of 43 patients with meniscal posterior root tear confirmed by arthroscopy were retrospective analyzed, including 25 males and 18 females, aged from 27 to 69 years old with an average age of(42.5±8. Read More