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JBJS Essent Surg Tech 2021 Oct-Dec;11(4). Epub 2021 Oct 7.

Department of Orthopedic Surgery, University of Minnesota, Minneapolis, Minnesota.

Meniscal root tears are soft-tissue and/or osseous injuries characterized by an avulsion of, or tear within 1 cm of, the native meniscal insertion. These injuries account for 10% to 21% of all meniscal tears, affecting nearly 100,000 patients annually. Medial meniscal posterior-root tears (MMPRTs) expose the tibiofemoral joint to supraphysiologic contact pressure, decreased contact area, and altered knee kinematics similar to a total meniscectomy. Read More

J ISAKOS 2022 Apr 30. Epub 2022 Apr 30.

Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL, USA.

Meniscal ramp lesions are disruptions of the posterior meniscotibial attachment of the medial meniscus and are commonly associated with anterior cruciate ligament injuries. However, they can be frequently missed when reviewing standard magnetic resonance imaging and difficult to treat. In this presentation, we describe our approach to repair a meniscal ramp lesion using a minimally invasive all-inside technique. Read More

Br J Sports Med 2022 Jun 8. Epub 2022 Jun 8.

Orthopaedics and Sports Medicine, Erasmus MC University Medical Centre, Rotterdam, The Netherlands

Objective: To compare outcomes from arthroscopic partial meniscectomy versus physical therapy in young patients with traumatic meniscal tears.

Methods: We conducted a multicentre, open-labelled, randomised controlled trial in patients aged 18-45 years, with a recent onset, traumatic, MRI-verified, isolated meniscal tear without knee osteoarthritis. Patients were randomised to arthroscopic partial meniscectomy or standardised physical therapy with an optional delayed arthroscopic partial meniscectomy after 3-month follow-up. Read More

J Magn Reson Imaging 2022 Jun 1. Epub 2022 Jun 1.

Professional Master Program in Artificial Intelligence in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.

Background: Timely diagnosis of meniscus injuries is key for preventing knee joint dysfunction and improving patient outcomes because it decreases morbidity and facilitates treatment planning.

Purpose: To train and evaluate a deep learning model for automated detection of meniscus tears on knee magnetic resonance imaging (MRI).

Study Type: Bicentric retrospective study. Read More

Am J Sports Med 2022 Jun 1:3635465221101136. Epub 2022 Jun 1.

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

Background: Representing approximately 10% of all meniscal tears, bucket-handle meniscal tears (BHMTs) are large longitudinal vertical tears that have an attached fragment flipped into the intercondylar notch. Meniscectomy often results in significant meniscal loss and increased joint loading. Alternatively, meniscal repair attempts to restore the function of the meniscus and aims to preserve joint mechanics. Read More

BMC Musculoskelet Disord 2022 May 30;23(1):510. Epub 2022 May 30.

Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, 317-1, Daemyungdong, Namku, Daegu, 42415, Republic of Korea.

Background: Deep learning (DL) is an advanced machine learning approach used in diverse areas, such as image analysis, bioinformatics, and natural language processing. A convolutional neural network (CNN) is a representative DL model that is advantageous for image recognition and classification. In this study, we aimed to develop a CNN to detect meniscal tears and classify tear types using coronal and sagittal magnetic resonance (MR) images of each patient. Read More

J Orthop Case Rep 2022 Jan;12(1):79-83

Department of Radiology, St. Paul's Hospital, Vancouver, British Columbia, Canada.

Introduction: Simultaneous bucket handle tear of both lateral and medial menisci is a rarely encountered entity. MR imaging helps in pre-operative diagnosis for optimal operative planning. However, as this condition is not seen in routine practice, awareness of various imaging signs is essential to identify this condition. Read More

Am J Sports Med 2022 Jul 23;50(8):2075-2082. Epub 2022 May 23.

Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Background: Arthroscopic partial meniscectomy (APM) is widely performed and remains an important therapeutic option for patients with a meniscal tear. However, it is debated whether or not APM accelerates the progression of osteoarthritis (OA) in the long term.

Purpose/hypothesis: The purpose was to compare the progression of OA measured by the change in tibiofemoral joint space width (JSW)-a quantitative measure of OA radiographic severity-across 3 groups with a midterm follow-up: (1) patients undergoing APM; (2) those with a meniscal tear treated nonoperatively; and (3) those without a tear. Read More

Eur J Orthop Surg Traumatol 2022 May 20. Epub 2022 May 20.

Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.

Purpose: Medial meniscus (MM) posterior root tears (PRTs) lead to abnormal kinematic changes in the knee and may induce pathological external rotation of the tibia during knee flexion. This study aimed to investigate changes in the length and inclination of the anterior cruciate ligament (ACL) after MM posterior root repair using magnetic resonance imaging (MRI).

Methods: This retrospective study included 44 patients who underwent MM posterior root repair between 2016 and 2019. Read More

J Orthop Surg (Hong Kong) 2022 May-Aug;30(2):10225536221101692

Division of Orthopaedic Surgery, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, 12951University of Miyazaki, Japan.

Purpose: To evaluate the preoperative deterioration of an isolated meniscal tear in patients aged 40 years or older, and whether time from injury to surgery is associated with worsening of a meniscal tear.

Methods: Patients aged 40 years or older who underwent arthroscopic surgery for isolated meniscal tear between 2014 and 2019 were retrospectively reviewed. The diagnostic magnetic resonance imaging (MRI) findings and arthroscopic findings were compared to evaluate the deterioration of meniscal tears. Read More

Radiol Med 2022 May 15. Epub 2022 May 15.

Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.

Arthroscopy has historically proved to allow accurate evaluation of the intra-articular structures of the knee, thanks the possibility of direct vision and palpation, and reduced perioperative morbidity. Over the last decade, the diagnostic role of arthroscopy has been further increased by its quite effective use in the treatment of the lesions. The recent and important advances in the technological-instrumental field have produced a safe visualization system used to pose a diagnosis in an outpatient setting, employing reduced-diameter arthroscopes (In-Office Needle Arthroscopy, IONA). Read More

Arthroscopy 2022 May 10. Epub 2022 May 10.

Department of Orthopedics, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China, Orthopedics Research Institute of Zhejiang University, Hangzhou, China. Electronic address:

Purpose: To investigate whether anterior tibial subluxation obtained from magnetic resonance imaging (MRI) could be a predictor of high-grade rotatory instability for anterior cruciate ligament (ACL) injuries, including acute and chronic cases.

Methods: From September 2016 to August 2018, we retrospectively investigated 163 patients with ACL injuries who subsequently underwent primary ACL reconstruction. Among them, 30 patients with high-grade rotatory instability (grade II/III pivot shift) were included in the high-grade group, and their age and sex were matched 1:2 to low-grade cases (Read More

Magn Reson Imaging Clin N Am 2022 May 13;30(2):351-362. Epub 2022 Apr 13.

Joint Department of Medical Imaging, University Health Network, Mount Sinai Hospital and Women's College Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5 Canada; Department of Medical Imaging, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Electronic address:

Meniscal tears are one of the most common knee injuries. Partial meniscectomy and meniscal repair are the most common treatment options in the setting of an unstable meniscal tear. Standard MR diagnostic criteria of a meniscal tear may be normal findings postoperatively. Read More

Clin J Sport Med 2022 Mar 29. Epub 2022 Mar 29.

Cedars-Sinai Kerlan Jobe Institute, Santa Monica, CA.

Objective: The aim of this study was to identify the accuracy of the McMurray test in the adolescent and pediatric population.

Design: Retrospective case series.

Setting: Tertiary care, institutional. Read More

J Ultrasound Med 2022 Mar 18. Epub 2022 Mar 18.

Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.

Objectives: To compare medial meniscal extrusion on weight-bearing ultrasound (US) with supine US and magnetic resonance (MR) imaging correlating with meniscal pathology and reported symptoms.

Methods: IRB approved study with informed consent. Patients obtaining routine knee MR imaging for suspected knee pathology were prospectively evaluated with supine and weight-bearing US of the medial meniscus. Read More

AJR Am J Roentgenol 2022 May 18:1-10. Epub 2022 May 18.

Department of Musculoskeletal Radiology, Fleury Medicina e Saúde, Sao Paulo, Brazil.

Meniscal root tears represent radial tears or avulsions of the meniscal cartilage at the tibial attachment site that profoundly affect meniscal biomechanics and kinematics. Meniscal root tears have the functional effect of a total meniscectomy and can lead to rapid degenerative change with development of early knee osteoarthritis (OA). A growing range of arthroscopic surgical techniques have been developed to repair meniscal root tears with the aim of restoring joint kinematics and contact pressures and delaying the development of OA. Read More

Int Orthop 2022 Jul 15;46(7):1563-1571. Epub 2022 Mar 15.

Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan.

Purpose: We compared the magnetic resonance imaging (MRI)-confirmed cyst formation rate after meniscal tear repair using a new all-inside suture device (N group) versus the older all-inside suture device (O group).

Methods: Between October 2008 and July 2017, 94 consecutive menisci of 89 patients were diagnosed with meniscal tears and underwent arthroscopic meniscal repair using the all-inside suture device. Five of these patients were lost to follow-up within 12 months and were excluded from the study. Read More

BMC Musculoskelet Disord 2022 Mar 14;23(1):247. Epub 2022 Mar 14.

Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China.

Background: Meniscus root tear is an uncommon but detrimental injury of the knee. Hoop stress is lost during meniscus root tear, which can lead to excessive tibiofemoral contact pressure and early development of osteoarthritis. Posterolateral meniscus root tears (PLRT) are more commonly associated with anterior cruciate ligament (ACL) tears. Read More

Cartilage 2022 Jan-Mar;13(1):19476035221085142

Department of Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.

Objective: To investigate compositional changes in the distal femoral condylar cartilage (FCC) of children and young adults with and without discoid meniscus by T2 relaxation time mapping.

Design: We retrospectively reviewed knee magnetic resonance images including sagittal T2 maps of distal FCC performed in patients with or without discoid meniscus. Combined meniscal pathology such as degeneration or tears was also reviewed. Read More

Arthroscopy 2022 03;38(3):670-672

University of Vermont, Larner College of Medicine, Orthopaedics and Rehabilitation, Burlington, Vermont, U.S.A.. Electronic address:

Meniscal tear patterns associated with anterior cruciate ligament (ACL) tears, such as root tears and ramp lesions are common but less easily recognized on magnetic resonance imaging (MRI) compared with a complete radial tear or a locked bucket-handle tear. Timely treatment of these tears improves outcomes in the setting of ACL reconstruction. While physical examination does not enable a definitive diagnosis of meniscal root tears and ramp lesions, high-grade laxity, including a 3+ Lachman and 3+ pivot shift, should raise suspicions for these tear patterns. Read More

Orthop J Sports Med 2022 Feb 24;10(2):23259671221079794. Epub 2022 Feb 24.

Department of Orthopedic Surgery, Columbia Orthopaedic Group, Columbia, Missouri, USA.

Background: Prospective evaluation of clinical outcomes after posterior meniscal root repair utilizing a transtibial pullout technique is limited, and factors that may contribute to outcomes are unclear.

Hypothesis: It was hypothesized that there would be an overall significant improvement in outcomes after root repair and that differences in clinical outcomes would correlate with age, body mass index (BMI), sex, and meniscal extrusion.

Study Design: Case-control study; Level of evidence, 3. Read More

BMC Musculoskelet Disord 2022 Mar 1;23(1):188. Epub 2022 Mar 1.

Department of Imaging, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, No. 1111, Xianxia Road, 200336, Shanghai, China.

Background: Fabella is a sesamoid bone of knee that has potential biomechanical function. We aimed to examine the fabellar prevalence and parameters in Chinese population and test the hypothesis that fabellar presence and morphology were associated with meniscus tear or ligament injury.

Methods: A total of 1011 knee magnetic resonance imaging scans from 979 patients with knee pain were analyzed retrospectively. Read More

Int J Gen Med 2022 18;15:1789-1794. Epub 2022 Feb 18.

Department of Orthopaedics, Peoples' Hospital of Deyang City, Deyang, 618000, Sichuan Province, People's Republic of China.

Purpose: The purpose of this study was to examine the relationship between distal femoral morphology and noncontact anterior cruciate ligament (ACL) rupture and the differences between digital X-ray imaging systems (DR) and magnetic resonance imaging (MRI) to evaluate distal femoral morphology.

Methods: A retrospective case-control study was performed on 120 patients. Two age- and sex-matched cohorts (each n = 60) were analyzed: primary ACL ruptures and a control group consisting of isolated meniscal tears. Read More

J Healthc Eng 2022 8;2022:7872500. Epub 2022 Feb 8.

Department of Chemical Engineering, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia.

The anterior cruciate ligaments (ACL) are the fundamental structures in preserving the common biomechanics of the knees and most frequently damaged knee ligaments. An ACL injury is a tear or sprain of the ACL, one of the fundamental ligaments in the knee. ACL damage most generally happens during sports, for example, soccer, ball, football, and downhill skiing, which include sudden stops or changes in direction, jumping, and landings. Read More

Exp Ther Med 2022 Mar 11;23(3):215. Epub 2022 Jan 11.

Department of Clinical Surgery, Faculty of Medicine and Pharmacy, Dunărea de Jos' University, 800008 Galați, Romania.

In recent years, platelet-rich plasma (PRP) therapy has been a subject of controversy in orthopedics field. Our objective was to assess the efficiency of PRP therapy for patients who have suffered grade 2 meniscal lesions and grade 2 anterior cruciate ligament (ACL) lesions, graded by magnetic resonance imaging (MRI). A retrospective observational study was conducted, which included 72 young recreational athletes who had been diagnosed with grade 2 meniscal injury, graded using MRI, that benefited from PRP therapy as an enhancement of the primary treatment, after cast immobilization. Read More

Arch Orthop Trauma Surg 2022 Jan 25. Epub 2022 Jan 25.

Klinik für Orthopädie und Unfallchirurgie, Martin Luther Krankenhaus, Caspar-Theyss-Strasse 27-31, 14193, Berlin, Germany.

Purpose: The aim of this study was to generate more information on the etiology and pathogenesis of medial (MM) and lateral (LM) meniscus root tears. Our hypothesis was that root tears of the MM predominantly result from degenerative damage, whereas root injuries of the LM are mainly of traumatic origin.

Methods: Consecutively, 53 patients with a root tear of the medial meniscus (MMRT) and 51 patients with a root tear of the lateral meniscus (LMRT) were included in this study. Read More

Eur Radiol 2022 Jun 12;32(6):3954-3962. Epub 2022 Jan 12.

Department of Radiology, Inje University Ilsan Paik Hospital, Goyang, Gyeonggido, Republic of Korea.

Objectives: We investigated the prevalence of anterolateral ligament (ALL) injury and lateral meniscus (LM) tear in cases with both-bundle tear and selective bundle incomplete tear of the anterior cruciate ligament (ACL).

Methods: A total of 174 cases of magnetic resonance (MR) images that had an ACL tear and underwent arthroscopic ACL reconstruction were retrospectively reviewed. ACL injury was classified into both bundle, anteromedial bundle, and posterolateral bundle (PL) on arthroscopic finding. Read More

Am J Sports Med 2022 Mar 7;50(3):652-661. Epub 2022 Jan 7.

Duke University, Durham, North Carolina, USA.

Background: Anterior cruciate ligament (ACL) tears can be devastating injuries, leading to joint instability, meniscal tears, and subsequent arthritis. It is unknown whether ACL reconstruction (ACLR) alters the natural history of joint degeneration in the ACL-deficient knee compared with nonoperative treatment, and few studies have examined outcomes in middle-aged patients.

Purpose: The objective of this study was to compare the midterm risk of subsequent ipsilateral knee surgery in middle-aged patients after an ACL injury treated with initial conservative (nonoperative) management (CM) versus ACLR (operative management [OM]) within 6 months of the diagnosis. Read More

Acta Radiol 2021 Dec 28:2841851211068268. Epub 2021 Dec 28.

Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.

Background: The association between size of ganglia or type of ganglia (intra-articular or extra-articular) and meniscal tears or severity of the osteoarthritis (OA) is not evaluated.

Purpose: To evaluate the prevalence, size, and location of intra- and extra-capsular ganglia at the gastrocnemius origin and to assess their associations with meniscal injury and grades of OA.

Material And Methods: This study included 301 consecutive patients who had knee pain and had undergone magnetic resonance imaging (MRI) of the knee. Read More

Front Bioeng Biotechnol 2021 2;9:747217. Epub 2021 Dec 2.

Dept. for Visual and Data-Centric Computing, Zuse Institute Berlin, Berlin, Germany.

We present a novel and computationally efficient method for the detection of meniscal tears in Magnetic Resonance Imaging (MRI) data. Our method is based on a Convolutional Neural Network (CNN) that operates on complete 3D MRI scans. Our approach detects the presence of meniscal tears in three anatomical sub-regions (anterior horn, body, posterior horn) for both the Medial Meniscus (MM) and the Lateral Meniscus (LM) individually. Read More