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Larson JH, Brusalis CM, Allahabadi S, Fenn TW, Chapman RS, Browning RB, Kaplan DJ, Nho SJ. Outcomes of Isolated Endoscopic Gluteal Tendon Repair Compared With Concomitant Endoscopic Gluteal Tendon Repair and Arthroscopic Hip Labral Repair: A Propensity-Matched Analysis With Minimum 2-Year Follow-up. Orthop J Sports Med 2024; 12:23259671231215340. [PMID: 38379577 PMCID: PMC10878227 DOI: 10.1177/23259671231215340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 06/29/2023] [Indexed: 02/22/2024] Open
Abstract
Background Both gluteal and labral tears are common sources of hip pain, but no studies have evaluated how concomitant arthroscopic labral repair and correction of femoroacetabular impingement syndrome (FAIS) affect outcomes after endoscopic gluteus/minimus repair. Purpose (1) To compare patient-reported outcomes (PROs) and clinically significant outcomes achievements between patients who underwent endoscopic gluteus medius/minimus and arthroscopic hip labral repair with correction of FAIS versus endoscopic gluteus medius/minimus repair without labral repair and (2) to define threshold scores required to achieve the minimal clinically important difference (MCID) and the Patient Acceptable Symptom State (PASS) for the Hip Outcome Score-Activities of Daily Living, Hip Outcome Score-Sports Specific, modified Harris Hip Score (mHHS), 12-item international Hip Outcome Tool, and visual analog scale for pain in these patients. Study Design Cohort study; Level of evidence, 3. Methods Patients who underwent primary endoscopic gluteus medius/minimus repair between 2012 and 2020 were identified. Those who underwent concomitant arthroscopic labral repair and correction of FAIS with femoroplasty or acetabuloplasty as indicated were propensity matched in a 1 to 1 ratio by sex, age, and body mass index to patients who underwent gluteus medius/minimus repair without labral repair. Patients who completed the study PROs were assessed preoperatively and at 2 years postoperatively. Threshold scores required to achieve the MCID and PASS thresholds were calculated. Results A total of 32 patients who underwent simultaneous gluteal and labral repair (G+L) were matched to 32 patients who underwent gluteal repair without labral repair (G); 75% of patients in the G cohort underwent labral debridement, while 25% in this cohort received no labral treatment. A significant difference was observed between groups in preoperative mHHS scores (G+L, 54.4 ± 12.9 vs G, 46.3 ± 14; P = .048) but no differences in any other PRO scores (P≥ .207). The MCID/PASS thresholds were as follows: Hip Outcome Score-Activities of Daily Living (11.14/83.82), Hip Outcome Score-Sports Specific (16.07/59.72), mHHS (11.47/70.95), 12-item international Hip Outcome Tool (13.73/45.49), and visual analog scale for pain (14.30/22). There were no significant differences in MCID or PASS achievement rates between the 2 groups (P≥ .108). Conclusion Patients who underwent combined G+L demonstrated comparable PROs and clinically significant outcomes achievement rates to patients who underwent G, highlighting sustained successful outcomes for patients with gluteal tendon pathology and concomitant FAIS and labral tears.
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Affiliation(s)
- Jordan H. Larson
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Christopher M. Brusalis
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Sachin Allahabadi
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Thomas W. Fenn
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Reagan S. Chapman
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Robert B. Browning
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Daniel J. Kaplan
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
| | - Shane J. Nho
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA
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Chang EY, Bencardino JT, French CN, Fritz J, Hanrahan CJ, Jibri Z, Kassarjian A, Motamedi K, Ringler MD, Strickland CD, Tiegs-Heiden CA, Walker REA. SSR white paper: guidelines for utilization and performance of direct MR arthrography. Skeletal Radiol 2024; 53:209-244. [PMID: 37566148 PMCID: PMC10730654 DOI: 10.1007/s00256-023-04420-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/23/2023] [Accepted: 07/29/2023] [Indexed: 08/12/2023]
Abstract
OBJECTIVE Direct magnetic resonance arthrography (dMRA) is often considered the most accurate imaging modality for the evaluation of intra-articular structures, but utilization and performance vary widely without consensus. The purpose of this white paper is to develop consensus recommendations on behalf of the Society of Skeletal Radiology (SSR) based on published literature and expert opinion. MATERIALS AND METHODS The Standards and Guidelines Committee of the SSR identified guidelines for utilization and performance of dMRA as an important topic for study and invited all SSR members with expertise and interest to volunteer for the white paper panel. This panel was tasked with determining an outline, reviewing the relevant literature, preparing a written document summarizing the issues and controversies, and providing recommendations. RESULTS Twelve SSR members with expertise in dMRA formed the ad hoc white paper authorship committee. The published literature on dMRA was reviewed and summarized, focusing on clinical indications, technical considerations, safety, imaging protocols, complications, controversies, and gaps in knowledge. Recommendations for the utilization and performance of dMRA in the shoulder, elbow, wrist, hip, knee, and ankle/foot regions were developed in group consensus. CONCLUSION Although direct MR arthrography has been previously used for a wide variety of clinical indications, the authorship panel recommends more selective application of this minimally invasive procedure. At present, direct MR arthrography remains an important procedure in the armamentarium of the musculoskeletal radiologist and is especially valuable when conventional MRI is indeterminant or results are discrepant with clinical evaluation.
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Affiliation(s)
- Eric Y Chang
- Radiology Service, VA San Diego Healthcare System, San Diego, CA, USA
- Department of Radiology, University of California, San Diego Medical Center, San Diego, CA, USA
| | - Jenny T Bencardino
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Cristy N French
- Department of Radiology, Penn State Hershey Medical Center, Hummelstown, PA, USA
| | - Jan Fritz
- Department of Radiology, New York University Grossman School of Medicine, New York, NY, USA
| | | | - Zaid Jibri
- GNMI in Mississauga, Greater Toronto Area, Toronto, ON, Canada
| | - Ara Kassarjian
- Department of Radiology, Division of Musculoskeletal Imaging, Olympia Medical Center, Elite Sports Imaging, Madrid, Spain
| | - Kambiz Motamedi
- Department of Radiology, University of California, Los Angeles Medical Center, Los Angeles, CA, USA
| | | | - Colin D Strickland
- Department of Radiology, University of Colorado School of Medicine, Aurora, CO, USA
| | | | - Richard E A Walker
- McCaig Institute for Bone and Joint Health, Calgary, Canada.
- Cumming School of Medicine, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada.
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Domb BG, Curley AJ. Editorial Commentary: Treatment of Concomitant Intra-Articular Pathology in Patients With Greater Trochanteric Pain Syndrome Is Indicated by Provocative Impingement or Instability Physical Examination and Ultrasound-Guided Analgesic Injection Testing. Arthroscopy 2023; 39:865-867. [PMID: 36740302 DOI: 10.1016/j.arthro.2022.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 08/18/2022] [Indexed: 02/07/2023]
Abstract
Endoscopic surgery can be used to address peritrochanteric pathology in patients with greater trochanteric pain syndrome. During management of these patients, surgeons must decide whether adjunctive hip arthroscopy to treat concomitant intra-articular pathology (such as labral tears or chondral lesions) is required, because the prevalence of intra-articular findings may be greater than the clinical significance. A thorough history and physical examination can help distinguish whether the symptoms are arising from a peritrochanteric issue (e.g., gluteal tendinopathy, trochanteric bursitis, external coxa saltans) versus an intra-articular pain generator. Increased symptoms with provocative impingement or instability testing indicate adjunctive hip arthroscopy to address intra-articular abnormalities. In addition, an ultrasound-guided analgesic injection into the hip joint or peritrochanteric region may aid in diagnosis. A patient with partial symptomatic relief from separate injections into both areas is a classic presentation and consistent with a mixed-picture of peritrochanteric and intra-articular pathology, which may be addressed with a combined endoscopic and arthroscopic approach.
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Shah AJ, Patel D. Imaging update on cartilage. J Clin Orthop Trauma 2021; 22:101610. [PMID: 34722147 PMCID: PMC8531853 DOI: 10.1016/j.jcot.2021.101610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 10/20/2022] Open
Abstract
In this update article, we present a review of the literature regarding the physiology of the articular cartilage, role of MR imaging in cartilage assessment, MRI sequences and protocols for cartilage imaging, brief overview of classifications and nomenclature for chondral and osteochondral lesions, MR imaging following cartilage repair and degenerative osteoarthritis.
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Affiliation(s)
- Ankur J. Shah
- Consultant Radiologist at Sadbhav Imaging Centre and Gujarat Imaging Centre, Ahmedabad, 380009, India
| | - Drushi Patel
- Consultant Radiologist, Gujarat Imaging Centre, Ahmedabad, 380009, India
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Gonzalez FM, Gagnon MH, Reiter D, Younan Y, Sayyid S, Singer A, Umpierrez M, Sharma GB, Robertson DD. Osteoarthritis of the hip: are degenerative tears of the acetabular labrum predictable from features on hip radiographs? Acta Radiol 2021; 62:628-638. [PMID: 32640887 DOI: 10.1177/0284185120936269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND A common feature of hip arthritis is the presence of labra tears. Recent literature suggests against the use of magnetic resonance imaging (MRI) in patients aged >45 years for the assessment of hip pain related to arthritis. PURPOSE To determine if radiographic features of osteoarthritis detectable on routine hip radiographs are accurate and reliable surrogate markers of degenerative acetabular labral tears identified on MR arthrography (MRA) and corroborated during arthroscopy. MATERIAL AND METHODS A retrospective study involving 86 symptomatic patients (hip pain) with radiologic work-up included MRA and pelvic or hip radiographs that underwent hip arthroscopy within three months. Imaging characteristics assessed on hip radiographs include measurements of superior acetabular, femoral head osteophyte, cortical thickness of the femoral shaft, and minimum joint space as well as presence of subchondral sclerosis of the femoral head and acetabulum, femoral shaft buttressing, and grade of arthritis. Presence of a labral tear was determined by consensus between three readers as well as by surgical correlation. The Pearson's chi-squared and Fisher's exact tests were used to compare presence of labral tears with each radiographic feature. RESULTS Seventy-one patients (82.6%) had labral tears: 49 (69%) women and 22 (31%) men. Receiver operating characteristic analysis showed statistical significance (P<0.05) between presence of a labral tear and acetabular and femoral head osteophyte sizes but failed to demonstrate any significance regarding acetabular subchondral sclerosis, cortical thickness, buttressing, or minimum joint space. CONCLUSIONS Radiographic markers such as the acetabular and femoral head osteophyte sizes demonstrated statistical significance with the presence of labral tears.
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Affiliation(s)
- Felix M Gonzalez
- Emory University School of Medicine, Atlanta, GA, USA
- Department of Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University Hospital, Atlanta, GA, USA
| | | | - David Reiter
- Department of Orthopaedic, Emory University Hospital, Atlanta, GA, USA
| | - Yara Younan
- Department of Radiology and Imaging Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Samia Sayyid
- Emory University School of Medicine, Atlanta, GA, USA
- Department of Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University Hospital, Atlanta, GA, USA
| | - Adam Singer
- Emory University School of Medicine, Atlanta, GA, USA
- Department of Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University Hospital, Atlanta, GA, USA
| | - Monica Umpierrez
- Emory University School of Medicine, Atlanta, GA, USA
- Department of Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University Hospital, Atlanta, GA, USA
| | | | - Douglas D Robertson
- Emory University School of Medicine, Atlanta, GA, USA
- Department of Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University Hospital, Atlanta, GA, USA
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Martin-Carreras T, Sebro R, Weintraub S. Hip Alpha Angle is Associated with Anterior-Superior Labral Tears but not Anterior Labral Tears. Curr Probl Diagn Radiol 2021; 50:159-163. [DOI: 10.1067/j.cpradiol.2019.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 08/24/2019] [Accepted: 09/03/2019] [Indexed: 11/22/2022]
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Outcome of Surgical Treatment of Hip Femoroacetabular Impingement Patients with Radiographic Osteoarthritis: A Meta-analysis of Prospective Studies. J Am Acad Orthop Surg 2019; 27:e70-e76. [PMID: 30256340 DOI: 10.5435/jaaos-d-17-00380] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
INTRODUCTION In this study, the prognostic value of osteoarthritis (OA) on the overall failure rate, pain, and function of surgical management of femoroacetabular impingement (FAI) was evaluated via meta-analysis. METHODS Relevant comparative studies were obtained from PubMed, OVID, and Cochrane database up until April 2016. Studies were selected according to the eligibility criteria. The study design, participant characteristics, interventions, and outcomes were reviewed after the assessment of methodological quality of each trial. All data were analyzed by Review Manager 5.3. RESULTS Seven studies were identified with 1,129 total patients, with 819 patients in the FAI group and 310 patients in the FAI with OA group. Pooled analyses showed that the overall failure rate was significantly higher in the FAI-OA group than in the FAI group (odds ratio, 8.50; 95% confidence interval, 4.44 to 16.26; P < 0.00001). In addition, the rate of conversion to total hip arthroplasty was significantly higher in the FAI-OA group (37.3%) than in the FAI group (9.7%) (odds ratio, 19.42; 95% confidence interval, 7.00 to 53.85; P < 0.00001). CONCLUSIONS We found that radiographic OA was correlated with higher failure rates, increased conversion to total hip arthroplasty, and worse outcomes after surgical management of FAI. LEVEL OF EVIDENCE Level II.
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Abstract
Magnetic resonance imaging (MRI) of the hip joint is performed for the diagnostics of many clinical pathologies. For clarification of pathologies of the hip joint conventional MRI and MR arthrography are used. The use of MRI either with or without the intravenous administration of contrast material is performed to diagnose bone marrow lesions, necrosis of the femoral head, inflammatory and tumorous lesions affecting the hip joint and its components. After the intra-articular administration of a diluted solution of contrast material, which results in distension of the joint, MR arthrography is performed for the diagnosis of intra-articular pathologies, such as lesions of the labrum acetabulare, chondral lesions and free intra-articular bodies. In recent times, MR arthrography is carried out with continuous traction of the limb to be examined because this leads to a distension of the joint and its components and in this way particularly lesions of the labrum with involvement of cartilage can be visualized even better. This article gives an overview of MRI and the accuracy of detecting lesions of the labrum acetabulare and the influence on the therapeutic approach.
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Affiliation(s)
- C Czerny
- Abteilung für Neuroradiologie/Muskuloskelettale Radiologie, Universitätsklinik für Radiologie und Nuklearmedizin, AKH Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich.
| | - C Chiari
- Universitätsklinik für Orthopädie, AKH Wien, Wien, Österreich
| | - I Nöbauer-Huhmann
- Abteilung für Neuroradiologie/Muskuloskelettale Radiologie, Universitätsklinik für Radiologie und Nuklearmedizin, AKH Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
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Heerey JJ, Kemp JL, Mosler AB, Jones DM, Pizzari T, Souza RB, Crossley KM. What is the prevalence of imaging-defined intra-articular hip pathologies in people with and without pain? A systematic review and meta-analysis. Br J Sports Med 2018. [PMID: 29540366 DOI: 10.1136/bjsports-2017-098264] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Intra-articular hip pathologies are thought to be associated with the development of hip and groin pain. A better understanding of the relationship between symptoms and imaging findings may improve the management of individuals with intra-articular hip pathologies. OBJECTIVE To undertake a systematic review and meta-analysis to determine the prevalence of intra-articular hip pathologies in individuals with and without pain. METHODS Seven electronic databases were searched in February 2017 for studies investigating the prevalence of intra-articular hip pathologies using MRI, MRA or CT. Two independent reviewers conducted the search, study selection, quality appraisal and data extraction. Meta-analysis was performed when studies were deemed homogenous, with a strength of evidence assigned to pooled results. RESULTS In general, studies were moderate to high risk of bias, with only five studies adjudged to be low risk of bias. The 29 studies reporting on the prevalence of intra-articular hip pathologies identified limited evidence of a labral tear prevalence of 62% (95% CI 47% to 75%) in symptomatic individuals, with moderate evidence identifying a labral tear prevalence of 54% (95% CI 41% to 66%) in asymptomatic individuals. Limited evidence demonstrated a cartilage defect prevalence of 64% (95% CI 25% to 91%) in symptomatic individuals, compared with moderate evidence of a cartilage defect prevalence of 12% (95% CI 7% to 21%) in asymptomatic individuals. CONCLUSION The prevalence of intra-articular hip pathologies is highly variable in both symptomatic and asymptomatic populations. The prevalence of intra-articular hip pathologies appears to be higher in symptomatic individuals. However, imaging-defined intra-articular hip pathologies are also frequently seen in asymptomatic individuals, highlighting a potential discordant relationship between imaging pathology and pain. PROSPERO REGISTRATION NUMBER CRD42016035444.
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Affiliation(s)
- Joshua J Heerey
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia
| | - Joanne L Kemp
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia
| | - Andrea B Mosler
- Rehabilitation Department, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - Denise M Jones
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia
| | - Tania Pizzari
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia
| | - Richard B Souza
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA
| | - Kay M Crossley
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia
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Ha YC, Lee YK, Koo KH, Kwon KB, Song SH. Prevalence and clinical significance of hypertrophic labrum in non-dysplastic hips. J Orthop Sci 2017; 22:512-516. [PMID: 28169108 DOI: 10.1016/j.jos.2017.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 12/06/2016] [Accepted: 01/14/2017] [Indexed: 12/01/2022]
Abstract
BACKGROUND Hypertrophic labrum in dysplastic hip has been frequently reported and is known as limbus in developmental dysplasia of the hip. However, hypertrophic labrum without hip dysplasia has not been reported to date. The purpose of this study was to define hypertrophic labrum and to investigate the prevalence and clinical significance of an abnormally hypertrophic labrum in non-dysplastic hips. METHODS Between 2007 and 2014, direct CT arthrography was performed in 464 patients (470 hips) who had chronic groin pain and positive impingement or Faber test. There were 189 male (192 hips) and 275 female (278 hips) patients. The mean age was 46.8 years (range, 16-74 years). The hypertrophic labrum was defined as a labrum wider than two standard deviations away from the mean. Surgical correlation of hypertrophic labrum was obtained in cases with hip arthroscopy by a single surgeon. RESULTS Seventeen hips (3.6%) were found to have a hypertrophic labrum which had a mean width of 11.2 mm (±1.1) (range, 9.8-14.1 mm). The average width (±SD) of the labrum without hypertrophy was 5.5 mm (±2.4) (range, 2-9.8 mm). Arthroscopic findings of the hypertrophic labrum included fissure and longitudinal tear at the chondrolabral junction and they were associated with chondral abnormality adjacent to the lesion. CONCLUSIONS Hypertrophic labrum without hip dysplasia is not rare with a high incidence of tears. Care should be taken during arthroscopic access to the hip joint in patients with this morphologic variation as iatrogenic damage can occur more easily. LEVEL OF EVIDENCE Case Series; Level IV.
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Affiliation(s)
- Yong-Chan Ha
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 224-1 Heukseok-dong, Dongjak-gu, Seoul 156-755, South Korea.
| | - Young-Kyun Lee
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam, Gyeonggi-do 463-707, South Korea.
| | - Kyung-Hoi Koo
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam, Gyeonggi-do 463-707, South Korea.
| | - Ki-Bum Kwon
- Department of Orthopaedic Surgery, Seonam University College of Medicine Myongji Hospital, 55 Hwasu-ro 14beon-gil, Deokyang-gu, Goyang-si, Gyeonggi-do 412-826, South Korea.
| | - Sang-Heon Song
- Department of Orthopaedic Surgery, Seonam University College of Medicine Myongji Hospital, 55 Hwasu-ro 14beon-gil, Deokyang-gu, Goyang-si, Gyeonggi-do 412-826, South Korea.
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