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Hua YF, Zhang YR, Guo L. Retrospective study of patellar fractures and damage of accessory soft tissue based on MRI. PLoS One 2024; 19:e0295671. [PMID: 38466690 PMCID: PMC10927098 DOI: 10.1371/journal.pone.0295671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 11/28/2023] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND To better understand the pathophysiological mechanisms of patellar fractures, MRI was utilized to identify the imaging signs of various types of patellar fractures. METHODS A retrospective study was performed using MRI images of 52 patients with patellar fractures. Observing the development of patellar and femoral morphology and the imaging manifestations of different fracture types, such as fracture displacement, and damage to accessory ligaments, tendons, and meniscus, type of joint cavity effusion, and damage to surrounding accessory bones were identified. RESULTS There were 21 tangential fractures (40.4%), 8 transverse fractures (15.4%), 8 longitudinal fractures (15.4%), 4 oblique fractures (7.7%), and 11 comminuted fractures (21.2%) among the 52 patients with patellar fracture. Tangential fractures begin at a younger age than the other four forms of fractures. When tangential fractures were compared to other types of fractures, medial patellar retinaculum and anterior and posterior cruciate ligament injuries were statistically significant (P< 0.05). The detection rate of trochlear dysplasia, type II and type III patellar was higher in patients with tangential fractures than in other fractures. CONCLUSIONS Tangential fractures are less common to cause anterior and posterior cruciate ligament injuries than other types of fractures, but they are more likely to cause medial patellar retinaculum injuries.
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Affiliation(s)
- Yi-Fan Hua
- Department of Radiology, Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
- Department of School Infirmary, Yunnan Minzu University, Kunming, Yunnan, P.R. China
| | - Yu-Rou Zhang
- Department of Radiology, Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Li Guo
- Department of Radiology, Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
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Guruprasad A, Sinha U, Kumar S, Kumar A, Ahmad S, Kumar P, Agrawal P. Utility of three-dimensional proton density-weighted sequence MRI in knee for the assessment of Anterolateral complex in Anterior cruciate ligament injury. Br J Radiol 2024; 97:583-593. [PMID: 38276884 PMCID: PMC11027298 DOI: 10.1093/bjr/tqae003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 10/09/2023] [Accepted: 01/03/2024] [Indexed: 01/27/2024] Open
Abstract
OBJECTIVES To assess the proportion and pattern of injury of the anterolateral ligament (ALL) and the Kaplan fibre (KF) complex in knees with anterior cruciate ligament (ACL) injuries on MRI using three-dimensional (3D) proton density (PD) sequences. METHODS A total of 88 patients having ACL injury were included in this cross-sectional study. 3D PD sequences were used to assess injury of ALL and the KF complex and were graded on a scale of 0 to 3. MR images were evaluated by two radiologists. Interobserver agreement was determined using Cohen Kappa. RESULTS Femoral, meniscal, and tibial portions of ALL were visualized in 90.9%, 92%, and 94.3% of the study subjects, respectively. Proximal and distal KF were visualized in 92% and 93.2% of patients, respectively. Injury to ALL and KF was seen in 63.6% and 17% of the patients, respectively. Excellent interobserver agreement was noted for the identification and grading of ALL and KF complex injuries. CONCLUSIONS Oblique reformatted 3DPD MRI reliably detect ALC; however, ALL injury is better characterized than KF injury using this sequence. ADVANCES IN KNOWLEDGE Given the potential role of anterolateral complex (ALC) in maintaining the rotational stability of the knee, ALC assessment using the 3D PD sequences and their oblique reformatted images should be incorporated as routine review area of the knee MRI, particularly in the setting of ACL tear.
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Affiliation(s)
- Ankith Guruprasad
- Department of Radiodiagnosis, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Upasna Sinha
- Department of Radiodiagnosis, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Sudeep Kumar
- Department of Orthopedics, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Avinash Kumar
- Department of Orthopedics, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Shamshad Ahmad
- Department of Community and Family Medicine, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Prem Kumar
- Department of Radiodiagnosis, All India Institute of Medical Sciences Patna, Bihar, 801507, India
| | - Prabhat Agrawal
- Department of Orthopedics, All India Institute of Medical Sciences Patna, Bihar, 801507, India
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Anterolateral ligament of the knee-Cadaver study in a Caucasian population. Rev Esp Cir Ortop Traumatol (Engl Ed) 2023; 67:T134-T138. [PMID: 36528296 DOI: 10.1016/j.recot.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/01/2022] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Despite the recognized importance of the anterolateral ligament (ALL) in rotational stability of the knee, some studies still deny its role and even its existence. We studied the prevalence of the ALL in a Caucasian population, as well as its characteristics and anatomical relationships. MATERIALS AND METHODS The study was performed on 20 knees from 10 embalmed cadavers. A lateral approach, as described by Steven Claes, was used and the relations of the ALL with the lateral epicondyle, lateral inferior genicular artery, lateral meniscus, Gerdy's tubercle and fibular head were recorded. Its length and its width were also measured. RESULTS The ALL was identified in 16 knees. Its origin was at a distance inferior to 1mm posterior and proximal to the lateral femoral epicondyle and insertion within a mean distance of 2.1±0.6mm from the tibial articular surface, 20.6±1.3mm from the Gerdy's tubercle and 20.3±1.2mm from the fibular head. In all cases ALL presented mutual fibers with the lateral meniscus. The length was 35.8±4.6mm and the width was 4.2±1.3/4.9±1.0/6.5±1.5mm at its proximal, middle and distal third, respectively. No difference was found between gender and the dimensions of the ligament. CONCLUSIONS The ALL was found in 80% of the knees. Its origin is closely related to the lateral collateral ligament and its insertion is halfway between the fibular head and the Gerdy's tubercle. In all cases, we verified the connection between ALL and the lateral meniscus.
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Fernandes JC, Pinho AR, Pereira PA, Madeira MD, Raposo FA, Sousa AN, Lobo JM. Anterolateral ligament of the knee-Cadaver study in a Caucasian population. Rev Esp Cir Ortop Traumatol (Engl Ed) 2023; 67:134-138. [PMID: 35691577 DOI: 10.1016/j.recot.2022.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/18/2022] [Accepted: 06/01/2022] [Indexed: 11/15/2022] Open
Abstract
INTRODUCTION Despite the recognized importance of the anterolateral ligament (ALL) in rotational stability of the knee, some studies still deny its role and even its existence. We studied the prevalence of the ALL in a Caucasian population, as well as its characteristics and anatomical relationships. MATERIALS AND METHODS The study was performed on 20 knees from 10 embalmed cadavers. A lateral approach, as described by Steven Claes, was used and the relations of the ALL with the lateral epicondyle, lateral inferior genicular artery, lateral meniscus, Gerdy's tubercle and fibular head were recorded. Its length and its width were also measured. RESULTS The ALL was identified in 16 knees. Its origin was at a distance inferior to 1mm posterior and proximal to the lateral femoral epicondyle and insertion within a mean distance of 2.1±0.6mm from de tibial articular surface, 20.6±1.3mm from the Gerdy's tubercle and 20.3±1.2mm from the fibular head. In all cases ALL presented mutual fibers with the lateral meniscus. The length was 35.8±4.6mm and the width was 4.2±1.3/4.9±1.0/6.5±1.5mm at its proximal, middle and distal third, respectively. No difference was found between gender and the dimensions of the ligament. CONCLUSIONS The ALL was found in 80% of the knees. Its origin is closely related to the lateral collateral ligament and its insertion is halfway between the fibular head and the Gerdy's tubercle. In all cases, we verified the connection between ALL and the lateral meniscus.
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Affiliation(s)
- J C Fernandes
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Center for Health Technology and Services Research (CINTESIS), Portugal.
| | - A R Pinho
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
| | - P A Pereira
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Center for Health Technology and Services Research (CINTESIS), Portugal
| | - M D Madeira
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Center for Health Technology and Services Research (CINTESIS), Portugal
| | - F A Raposo
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
| | - A N Sousa
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
| | - J M Lobo
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
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Aparisi Gómez MP, Marcheggiani Muccioli GM, Guglielmi G, Zaffagnini S, Bazzocchi A. Particularities on Anatomy and Normal Postsurgical Appearances of the Knee. Radiol Clin North Am 2023; 61:219-247. [PMID: 36739143 DOI: 10.1016/j.rcl.2022.10.009] [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: 12/15/2022]
Abstract
Detailed knowledge of anatomy helps to understand pathologic processes. This article focuses on the anatomy and functionality of the knee, with emphasis on recently studied concepts and anatomic features that have an association with the development of pathology. The most common anatomic variants posing a challenge for diagnosis and other common findings in asymptomatic patients are reviewed. Good understanding of the different surgical procedures helps in providing as much information as possible to guarantee a positive outcome, improving prognosis. We review what are the commonly expected postsurgical appearances and the most common postsurgical complications.
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Affiliation(s)
- Maria Pilar Aparisi Gómez
- Department of Radiology, Auckland City Hospital, 2 Park Road, Grafton, Auckland 1023, New Zealand; Department of Radiology, IMSKE, Calle Suiza, 11, Valencia 46024, Spain
| | - Giulio Maria Marcheggiani Muccioli
- 2nd Orthopaedic and Traumatology Clinic, IRCCS Istituto Ortopedico Rizzoli, Via G. C. Pupilli 1, Bologna 40136, Italy; Dipartimento di Scienze Biomediche e Neuromotorie DIBINEM, University of Bologna, Via San Vitale, Bologna 40125, Italy
| | - Giuseppe Guglielmi
- Department of Radiology, Hospital San Giovanni Rotondo, Italy; Department of Radiology, University of Foggia, Viale Luigi Pinto 1, Foggia 71100, Italy
| | - Stefano Zaffagnini
- 2nd Orthopaedic and Traumatology Clinic, IRCCS Istituto Ortopedico Rizzoli, Via G. C. Pupilli 1, Bologna 40136, Italy; Dipartimento di Scienze Biomediche e Neuromotorie DIBINEM, University of Bologna, Via San Vitale, Bologna 40125, Italy
| | - Alberto Bazzocchi
- Diagnostic and Interventional Radiology, IRCCS Istituto Ortopedico Rizzoli, Via G. C. Pupilli 1, Bologna 40136, Italy.
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Suh DK, Cho IY, Noh S, Yoon DJ, Jang KM. Anatomical and Biomechanical Characteristics of the Anterolateral Ligament: A Descriptive Korean Cadaveric Study Using a Triaxial Accelerometer. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:419. [PMID: 36837620 PMCID: PMC9964873 DOI: 10.3390/medicina59020419] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/11/2023] [Accepted: 02/17/2023] [Indexed: 02/25/2023]
Abstract
Background and Objectives: The anterolateral ligament (ALL) could be the potential anatomical structure responsible for rotational instability after anterior cruciate ligament (ACL) reconstruction. The purpose of this study was to investigate the anatomical and biomechanical characteristics of the ALL in Korean cadaveric knee joints. Materials and Methods: Twenty fresh-frozen cadaveric knees were dissected and tested. Femoral and tibial footprints of the ALL were recorded. Pivot shift and Lachman tests were measured with KiRA. Results: The prevalence of ALL was 100%. The average distance of the tibial footprint to the tip of the fibular head was 19.85 ± 3.41 mm; from the tibial footprint to Gerdy's tubercle (GT) was 18.3 ± 4.19 mm; from the femoral footprint to the lateral femoral epicondyle was 10.25 ± 2.97 mm. ALL's footprint distance was the longest at 30° of flexion (47.83 ± 8.05 mm, p < 0.01) in a knee with intact ALL-ACL and neutral rotation. During internal rotation, the footprint distance was the longest at 30° of flexion (50.05 ± 8.88 mm, p < 0.01). Internal rotation produced a significant increase at all three angles after ACL-ALL were transected (p = 0.022), where the footprint distance was the longest at 30° of flexion (52.05 ± 7.60 mm). No significant difference was observed in KiRA measurements between intact ALL-ACL and ALL-transected knees for pivot shift and Lachman tests. However, ACL-ALL-transected knees showed significant differences compared to the intact ALL-ACL and ALL-transected knees (p < 0.01). Conclusions: The ALL was identified as a distinct ligament structure with a 100% prevalence in this cadaveric study. The ALL plays a protective role in internal rotational stability. An isolated ALL transection did not significantly affect the ALL footprint distances or functional stability tests. Therefore, the ALL is thought to act as a secondary supportive stabilizer for rotational stability of the knee joint in conjunction with the ACL.
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Affiliation(s)
- Dae Keun Suh
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Il-Yup Cho
- Joint Center, Seoul Barunsesang Hospital, Seoul 08523, Republic of Korea
| | - Sehyun Noh
- College of Medicine, Korea University, Seoul 02841, Republic of Korea
| | - Dong Joo Yoon
- College of Medicine, Korea University, Seoul 02841, Republic of Korea
| | - Ki-Mo Jang
- Department of Orthopaedic Surgery, Anam Hospital, Korea University College of Medicine, Seoul 02841, Republic of Korea
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Hodel S, Torrez C, Flury A, Fritz B, Steinwachs MR, Vlachopoulos L, Fucentese SF. Tibial internal rotation in combined anterior cruciate ligament and high-grade anterolateral ligament injury and its influence on ACL length. BMC Musculoskelet Disord 2022; 23:262. [PMID: 35303847 PMCID: PMC8932291 DOI: 10.1186/s12891-022-05218-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 03/14/2022] [Indexed: 01/11/2023] Open
Abstract
Background Assessment of combined anterolateral ligament (ALL) and anterior cruciate ligament (ACL) injury remains challenging but of high importance as the ALL is a contributing stabilizer of tibial internal rotation. The effect of preoperative static tibial internal rotation on ACL -length remains unknown. The aim of the study was analyze the effect of tibial internal rotation on ACL length in single-bundle ACL reconstructions and to quantify tibial internal rotation in combined ACL and ALL injuries. Methods The effect of tibial internal rotation on ACL length was computed in a three-dimensional (3D) model of 10 healthy knees with 5° increments of tibial internal rotation from 0 to 30° resulting in 70 simulations. For each step ACL length was measured. ALL injury severity was graded by a blinded musculoskeletal radiologist in a retrospective analysis of 61 patients who underwent single-bundle ACL reconstruction. Preoperative tibial internal rotation was measured in magnetic resonance imaging (MRI) and its diagnostic performance was analyzed. Results ACL length linearly increased 0.7 ± 0.1 mm (2.1 ± 0.5% of initial length) per 5° of tibial internal rotation from 0 to 30° in each patient. Seventeen patients (27.9%) had an intact ALL (grade 0), 10 (16.4%) a grade 1, 21 (34.4%) a grade 2 and 13 (21.3%) a grade 3 injury of the ALL. Patients with a combined ACL and ALL injury grade 3 had a median static tibial internal rotation of 8.8° (interquartile range (IQR): 8.3) compared to 5.6° (IQR: 6.6) in patients with an ALL injury (grade 0–2) (p = 0.03). A cut-off > 13.3° of tibial internal rotation predicted a high-grade ALL injury with a specificity of 92%, a sensitivity of 30%; area under the curve (AUC) 0.70 (95% CI: 0.54–0.85) (p = 0.03) and an accuracy of 79%. Conclusion ACL length linearly increases with tibial internal rotation from 0 to 30°. A combined ACL and high-grade ALL injury was associated with greater preoperative tibial internal rotation. This potentially contributes to unintentional graft laxity in ACL reconstructed patients, in particular with concomitant high-grade ALL tears. Study design Cohort study; Level of evidence, 3. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-022-05218-8.
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Affiliation(s)
- Sandro Hodel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland.
| | - Carlos Torrez
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Andreas Flury
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Benjamin Fritz
- Department of Radiology, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Matthias R Steinwachs
- SportClinic Zurich Hirslanden Clinic, Witellikerstrasse, 40, 8032, Zurich, Switzerland
| | - Lazaros Vlachopoulos
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Sandro F Fucentese
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
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Kim JN, Park HJ, Kim MS, Won SY, Kim M, Park JH, Kim E, Park JY. Prevalence of anterolateral ligament injuries and lateral meniscus tear on MR imaging in patients with both-bundle tear vs. selective bundle incomplete tear of the anterior cruciate ligament. Eur Radiol 2022; 32:3954-3962. [PMID: 35020013 DOI: 10.1007/s00330-021-08472-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 12/18/2022]
Abstract
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. The ALL was divided into three portions: femoral, meniscal, and tibial. ALL injury was scored into three groups: grade 0 is intact; grade 1 is stranding and edema surrounds the expected location of the ALL; grade 2 is clear discontinuity of the ALL consistent with rupture. Traumatic LM tear was also assessed on MR images. RESULTS The total prevalence of ALL injury was 36.2% (reader 1) and 42.0% (reader 2). ALL injury was statistically related to the selective bundle tear (p = 0.002 and 0.004, readers 1 and 2). PL bundle tear was significantly correlated with the ALL injury (p value < 0.001, readers 1 and 2, both). The location and grade of ALL injury were not significantly correlated with the type of ACL injury. LM tear was not significantly related to the types of ACL tear (p = 0.208 and 0.907, readers 1 and 2) and ALL injury (p value = 0.096 and 0.383, readers 1 and 2). CONCLUSIONS ALL injury was significantly related to the PL bundle tear of the ACL. LM tear was not significantly correlated with the types of ACL injury and ALL injury. KEY POINTS • Anterolateral ligament (ALL) injury was significantly related to the posterolateral bundle (PL) tear of the anterior cruciate ligament (ACL). • Lateral meniscus (LM) tear was not significantly correlated with the types of ACL injury and ALL injury. • Clinicians and radiologists should be aware of these relationships and scrutinize ALL injury in cases with PL bundle tears, even with an incomplete ACL injury.
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Affiliation(s)
- Ji Na Kim
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, #108 Pyung-dong, Jongno-gu, Seoul, 03181, Republic of Korea
| | - Hee Jin Park
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, #108 Pyung-dong, Jongno-gu, Seoul, 03181, Republic of Korea.
| | - Myung Sub Kim
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, #108 Pyung-dong, Jongno-gu, Seoul, 03181, Republic of Korea
| | - So Yeon Won
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, #108 Pyung-dong, Jongno-gu, Seoul, 03181, Republic of Korea
| | - Minchul Kim
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, #108 Pyung-dong, Jongno-gu, Seoul, 03181, Republic of Korea
| | - Jai Hyung Park
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Eugene Kim
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ji Yeon Park
- Department of Radiology, Inje University Ilsan Paik Hospital, Goyang, Gyeonggido, Republic of Korea
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Ward P, Chang P, Radtke L, Brophy RH. Clinical Implications of Bone Bruise Patterns Accompanying Anterior Cruciate Ligament Tears. Sports Health 2021; 14:585-591. [PMID: 34231443 DOI: 10.1177/19417381211029583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Anterior cruciate ligament (ACL) tears are common injuries; they are often associated with concomitant injuries to other structures in the knee, including bone bruises. While there is limited evidence that bone bruises are associated with slightly worse clinical outcomes, the implications of bone bruises for the articular cartilage and the risk of developing osteoarthritis (OA) in the knee are less clear. Recent studies suggest that the bone bruise pattern may be helpful in predicting the presence of meniscal ramp lesions. EVIDENCE ACQUISITION A literature review was performed in EMBASE using the keyword search phrase (acl OR (anterior AND cruciate AND ligament)) AND ((bone AND bruise) OR (bone AND contusion) OR (bone AND marrow AND edema) OR (bone AND marrow AND lesion) OR (subchondral AND edema)). STUDY DESIGN Clinical review. LEVEL OF EVIDENCE Level 4. RESULTS The literature search returned 93 articles of which 25 were ultimately included in this review. Most studies identified a high prevalence of bone bruises in the setting of acute ACL injury. Individual studies have found relationships between bone bruise volume and functional outcomes; however, these results were not supported by systematic review. Similarly, the literature has contradictory findings on the relationship between bone bruises and the progression of OA after ACL reconstruction. Investigations into concomitant injury found anterolateral ligament and meniscal ramp lesions to be associated with bone bruise presence on magnetic resonance imaging. CONCLUSION Despite the ample literature identifying the prevalence of bone bruises in association with ACL injury, there is little evidence to correlate bone bruises to functional outcomes or progression of OA. Bone bruises may best be used as a marker for concomitant injury such as medial meniscal ramp lesions that are not always well visualized on magnetic resonance imaging. Further research is required to establish the longitudinal effects of bone bruises on ACL tear recovery. STRENGTH OF RECOMMENDATION TAXONOMY 2.
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Affiliation(s)
- Patrick Ward
- Washington University School of Medicine, St Louis, Missouri
| | - Peter Chang
- Department of Orthopaedic Surgery, Washington University School of Medicine, St Louis, Missouri
| | - Logan Radtke
- University of South Dakota Sanford School of Medicine, Sioux Falls, South Dakota
| | - Robert H Brophy
- Department of Orthopaedic Surgery, Washington University School of Medicine, St Louis, Missouri
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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.
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