Labral Injury Research Articles

Mast Cells Mediate Acute Inflammatory Responses After Glenoid Labral Tears and Can Be Inhibited With Cromolyn in a Rat Model.

Injuries to the glenoid labrum have been recognized as a source of joint pain and discomfort, which may be associated with the inflammatory responses that lead to the deterioration of labral tissue. However, it is unclear whether the torn labrum prompts mast cell (MC) activation, resulting in synovial inflammatory responses that lead to labral tissue degeneration. To determine the potential influence of activated MC on synovial inflammatory responses and subsequent labral tissue degeneration and shoulder function deterioration in a rat model by monitoring MC behavior and sequential inflammatory responses within the synovial tissue and labral tissue after injury, suture repair, and MC stabilizer administration. Controlled laboratory study. Anteroinferior glenoid labral tears were generated in the right shoulder of rats (n = 20) and repaired using a tunneled suture technique. Synovial tissue inflammatory responses were modulated in some rats with intraperitoneal administration of an MC stabilizer-cromolyn (n = 10). At weeks 1 and 3, MC activation, synovial inflammatory responses, and labral degeneration were histologically evaluated. Simultaneously, gait analysis was performed before and after surgical repair to assess the worsening of the shoulder function after the injury and treatment. Resident MC degranulation after labral injury (50.48% ± 8.23% activated at week 1) contributed to the initiation of synovial tissue inflammatory cell recruitment, inflammatory product release, matrix metalloproteinase-13, and subsequent labral tissue extracellular matrix degeneration. The administration of cromolyn, an MC stabilizer, was found to significantly diminish injury-mediated inflammatory responses (inflammatory cell infiltration and subsequent proinflammatory product secretion) and improve shoulder functional recovery. MC activation is responsible for labral tear-associated synovial inflammation and labral degeneration. The administration of cromolyn can significantly diminish the cascade of inflammatory reactions after labral injury. Our findings support the concept that MC stabilizers may be used as a complementary therapeutic option in the treatment and repair of labral tears.

Value of MR Arthrography in Labral and Chondral Injuries in Cases of Clinically Detected Femoroacetabular Impingement

Value of MR Arthrography in Labral and Chondral Injuries in Cases of Clinically Detected Femoroacetabular Impingement

Magnetic resonance imaging of the shoulder in symptomatic professional rugby players: a retrospective analysis.

Shoulder injuries in rugby players are common due to frequent high-impact collisions and tackles. This study aimed to describe the spectrum and pattern of shoulder MRI findings in professional rugby players. Single-center retrospective study of shoulder MRI was carried out between 2012 and 2016 in symptomatic professional male rugby league and rugby union players. One hundred ten shoulder MRIs were scored for rotator cuff and long head of biceps tendons, labral, bursal, joint, and osseous abnormalities. MRI features were compared using the chi-square or Fisher's exact tests for categorical variables. There were a total of one hundred ten professional male rugby players (80 rugby league and 30 rugby union), with a mean age of 24.6 (range 17-38) and 23.7 (range 17-33) years old, respectively. Rotator cuff or long head biceps abnormality was found in 36 (33%) players, of which 22 (20%) were either partial or full-thickness tears. Glenoid labral tears were present in 63 (57%) players. There was no significant difference (p > 0.05) in the frequency of tears of the superior (24%), anterior inferior (25%), posterior superior (25%), and posterior inferior (32%) labrum. Forty-seven percent of players presented with two or more abnormalities of the rotator cuff tendons and glenoid labrum. There were significantly more osseous abnormalities in backs compared to forwards (48% vs. 21%; p = 0.01). There is a wide spectrum of shoulder abnormalities on MRI in professional rugby players, and many have two or more abnormalities. In common with other contact sports, posterior labral injury was a common finding and may relate to sub-clinical trauma, without an association with instability.

Comparative Analysis of Musculoskeletal Ultrasonography Versus MRI in Diagnosing Shoulder Injuries

This study aimed to compare the diagnostic accuracy and cost-effectiveness of musculoskeletal ultrasonography (US) versus magnetic resonance imaging (MRI) in detecting shoulder injuries. Conducted at the Department of Physical Medicine and Rehabilitation, BSMMU, Dhaka, Bangladesh, from January to June 2024, the study included 120 patients with suspected shoulder pathologies. Patients were evaluated using both US and MRI, and findings for rotator cuff tears, labral injuries, and tendonitis were analyzed. MRI demonstrated higher diagnostic accuracy across all conditions, with sensitivity rates of 95%, 91%, and 92% for rotator cuff tears, labral injuries, and tendonitis, respectively, compared to 88%, 79%, and 86% for US. Inter-rater agreement between US and MRI was substantial, with Cohen's Kappa coefficients of 0.75 for rotator cuff tears, 0.70 for labral injuries, and 0.73 for tendonitis. Cost-effectiveness analysis revealed that US was significantly more affordable, with an average cost of 15,000 Tk per patient compared to 60,000 Tk for MRI. Additionally, the time to diagnosis was shorter for US (2 days) than for MRI (7 days). Although US required slightly more additional interventions (13.3% vs. 8.3%), this difference was not statistically significant. The findings suggest that while MRI is more accurate, US is a cost-effective and time-efficient alternative, particularly valuable in resource-limited settings.

Comparação de técnicas cirúrgicas para reparação de lesões SLAP no ombro

Introduction: SLAP (Anterior Posterior-Posterior Upper Labral) injuries in the shoulder are common in athletes and physically active individuals, often requiring surgical intervention to restore function and relieve pain. This systematic review compared different surgical techniques, such as tenodesis and labral repair, evaluating functional outcomes, postoperative complications, and rehabilitation efficacy. Methods: Randomized, observational studies, systematic reviews, and meta-analyses of patients with SLAP lesions submitted to various surgical techniques were included. Searches were conducted in databases such as PubMed, MEDLINE, Embase, and Cochrane. Methodological quality was assessed using the ROB 2 and ROBINS-I tools, and heterogeneity was analyzed using the I² index. Results: Patients under 40 years of age had better results with labral repair, while those over 40 years of age had superior outcomes with tenodesis. Arthroscopic techniques were associated with shorter recovery time and fewer complications compared with open techniques, especially in complex lesions. Rehabilitation, particularly hydrotherapy, has been shown to significantly improve pain control and range of motion. Heterogeneity between studies was moderate to high (I² = 65%), with the risk of bias being low in most included studies. Conclusion: The choice of surgical technique should be personalized, considering factors such as age, type of injury, and patient goals. Labral repair is recommended for younger patients, while tenodesis may be more suitable for older patients. Arthroscopic techniques offer advantages in terms of recovery and complications, and proper rehabilitation is crucial for postoperative success. Future studies should focus on high-quality randomised controlled trials to improve the available evidence.

Arthroscopic Anterior and Inferior Labral Repair for Traumatic Shoulder Instability

Background: Anterior glenohumeral instability is common in the young and athletic population and can develop from a dislocation or subluxation event. Avulsion of the anterior inferior glenoid labrum (Bankart lesion) occurs in over 90% of these events. In patients who have unsuccessful conservative management or present with a high risk for redislocation, surgical intervention is indicated. This video presents our technique for arthroscopic anterior and inferior labral repair. Indications: In addition to those patients who have unsuccessful conservative management, surgical management of anterior glenohumeral instability is indicated in patients who are at high risk for redislocation after an initial instability event. These patients include young age and participation in contact sports. Generally, glenoid bone loss over 25% warrants open bony augmentation, but arthroscopic bony augmentation techniques are evolving. Further, the management of “near-track” lesions, or “on-track” lesions with a small distance to dislocation value, remains controversial. Technique Description: This procedure is performed in the lateral decubitus position. A second anterior portal is created distal and lateral to the first anterior portal, entering the shoulder joint just above the subscapularis. The anterior-inferior labrum is prepared with an arthroscopic elevator, followed by a rasp and superior labral anterior and posterior burr. A suture tape is then shuttled around the labrum and the anchor drilled in the appropriate position at the glenoid rim, not violating the cartilage. Anchor placement occurs from an inferior to a superior fashion until the entire labral injury is repaired. Results: This video presents a technique to achieve arthroscopic fixation of an anterior-inferior labral tear in a young athlete with anterior glenohumeral instability. Patients are taken through 3 phases of rehabilitation before return to sport-specific activities, such as contact sports, around 6 months postoperatively. Return-to-sport rates for contact and collision athletes range from 80% to 100%, with recurrent rates ranging from 5% to 20%. Discussion/Conclusion: Arthroscopic anterior-inferior labral repair is a useful technique for minimally invasive glenohumeral stabilization in indicated patients who have minimal glenoid bone loss. Portal placement, labral mobilization, and glenoid preparation are paramount in optimizing the healing potential of the fixation construct. Patient Consent Disclosure Statement: The author(s) attests that consent has been obtained from any patient(s) appearing in this publication. If the individual may be identifiable, the author(s) has included a statement of release or other written form of approval from the patient(s) with this submission for publication.

The critical importance of recognition, evaluation, and management of mental health on outcomes following hip arthroscopy – A synthetic narrative review: Current concepts

Mental health and wellness influence patients with hip pain and dysfunction secondary to Femoroacetabular Impingement Syndrome, acetabular dysplasia, and labral injury. Disorders of mental wellness may impact hip preservation surgery patients both before and after surgery. Major depression and generalized anxiety are the two most common diagnoses that affect hip preservation surgery patients. There are dozens of unique questionnaires that can subjectively and objectively characterize the mental health of patients with hip pain. Pain threshold and pain tolerance are two issues that must be recognized to optimally predict treatment outcome in an informed consent shared decision-making discussion. Patient expectations may also significantly influence preoperative symptoms and postoperative outcome. Pain threshold, pain tolerance, and patient expectations are entities traditionally viewed as qualitative and unmeasurable. However, many valid and reliable methods exist to quantitatively assess these patient-specific variables. Recent original research and synthetic review publications have consistently concluded similar findings: patients with disorders of mental wellness generally have lower preoperative patient-reported outcome scores, do improve following surgery, albeit to a lesser magnitude than non-mental disorder patients, and ultimately have lower postoperative scores at their final follow. As with most Orthopedic Surgery literature, the investigation of mental health and hip preservation is primarily via retrospective level four evidence with small numbers of patients from a single-center and single-surgeon at short-term follow-up. Although hip preservation surgeons are Orthopedic Surgeons by training and practice, they must be able to recognize mental wellness disorders and either treat or refer when suspected or identified.

Poster 160: Preoperative MRI Underestimates Shoulder Labral Injuries Compared with Diagnostic Arthroscopy

Objectives: To compare the overall agreement in the magnitude of shoulder labral injuries between preoperative MRI and assessment at the time of diagnostic arthroscopy. Methods: A retrospective chart review was performed of patients undergoing primary arthroscopic labral repair procedures between February 2018 and February 2023. Exclusion criteria included prior ipsilateral shoulder surgery, MRI study performed at outside health system, and incomplete documentation of labral tear location. Age, gender, and dates of injury, imaging, and surgery were recorded. Radiology and operative reports were reviewed to record the location and extent of the labral tear using conventional clock-face coordinates. Tear locations were further classified as either anterior (2-6 o’clock), posterior (6-10 o’clock), or superior (10-2 o’clock). MRI studies were performed by 1.5-Tesla scanner and all radiology reports were performed by fellowship-trained musculoskeletal radiologists at a single health system. Subgroup analysis of labral tear size on radiology interpretation was performed between MRI arthrogram (MRA) and conventional MRI studies. Results: A total of 138 subjects (mean age 25.8 years, 73% male) met criteria for inclusion in this study. Of the included subjects, 105 underwent MRI arthrogram and 33 underwent conventional MRI studies. The average time from initial injury to MRI was 153.4 days and the average time from MRI to surgical intervention was 66.8 days. The average total recorded labral tear size in clock-face coordinates was significantly greater on diagnostic arthroscopy compared with the radiologist MRI interpretation (4.4 vs 3.6, p<0.01). The average labral tear size in the posterior region was also significantly greater on diagnostic arthroscopy (2.4 vs 1.6, p<0.01). The average labral tear size in the anterior (2.5 vs 2.2, p=0.08) and superior (1.6 vs 1.5, p=0.29) regions was greater on diagnostic arthroscopy but did not reach statistical significance. The difference in total and posterior tear size remained significant in both the arthrogram and conventional MRI subgroups. Subjects undergoing MRI arthrogram had a significantly greater reported size of anterior labral tears in clock-face coordinates compared with conventional MRI (2.7 vs 2.0, p=0.03), but did not reach significance for the posterior (p=0.40), superior (p=0.31), and the overall global labrum (p=0.29). Conclusions: MRI significantly underestimate the overall size of labral tears in setting of shoulder instability, particularly in the posterior labrum. Surgeons should account for potential underestimation of true labral injury during preoperative planning for surgical management of shoulder instability.

Paper 41: Does MR Arthrography Improve Evaluation of Patients with Posterior Shoulder Instability? An Analysis from the MOON Shoulder Instability Group

Objectives: Posterior shoulder instability is an uncommon injury, accounting for 2-12% of shoulder instability patients. Magnetic resonance imaging (MRI) is often utilized to non-invasively evaluate the joint for labral, cartilage, and bony injury. MR arthrography (MRA) may improve the evaluation of these intra-articular structures, but requires additional cost, time, and an invasive procedure. Moreover, its benefits for patients with posterior shoulder instability are unclear. Accurate imaging is critical in patients undergoing surgery because certain findings may influence the surgical approach. Thus, the purpose of this study is to compare the accuracy of MRA and non-enhanced MRI in detecting labral, chondral, and osseous lesions in patients with posterior shoulder instability. Methods: There were 291 patients with unilateral posterior shoulder instability who had preoperative MRA or MRI between 2006 and 2021 in the MOON database. Images were reviewed by a fellowship-trained musculoskeletal radiologist with 10+ years of experience and an orthopaedic surgeon. Evaluators were blinded to age, gender, medical history, MR report, and arthroscopic findings, but were aware of the patient's history of posterior shoulder instability. Examinations were evaluated for presence, location, morphology, and length of glenoid labral tears. Tear length and localization were noted using a standard clock face. The presence and size of humeral/glenoid osseous and cartilage lesions was also noted.Intraoperative findings from arthroscopic evaluation were documented by the surgeon using a standard response questionnaire. Diagnostic performance of standard MRA and MRI were evaluated using sensitivity and specificity with arthroscopic evaluation as the gold-standard. Chi-squared or Fisher’s exact tests were used to compare the sensitivities and specificities of MRA and MRI. Significance was defined as P < 0.05. Results: 200 patients (69%) had MRA, while 91 patients had non-contrast MRIs of the shoulder. On imaging evaluation, 273 (94%) patients had labral tears with a mean tear size of 156º. 39 (13%) patients had humeral cartilage lesions, whereas 40 (14%) patients had glenoid cartilage lesions. 34 (12%) patients had glenoid bone loss greater than 5%. The mean glenoid bone loss was 12% (range, 5% - 26%). A reverse Hill-Sachs lesion was present in 35 (12%) patients. 16 (6%) patients had bipolar bone loss. The sensitivity for detection of labral tears was high for both MRA (0.95) and standard MRI (0.98) (Tables 1 and 2), though the specificity was low for both modalities (0.25 and 0.40, respectively). There was no difference in the sensitivities or specificities of the two imaging modalities in the detection of labral tears. MRA had a lower sensitivity than MRI in the detection of glenoid cartilage lesions (0.31 vs 0.88, p < 0.001), but no difference was observed for specificity. There was no difference in the sensitivities and specificities of MRA and MRI for humeral cartilage lesions (p = 0.354).MRA had a higher sensitivity than MRI in assessing glenoid bone loss (0.78 vs 0.50, p < 0.001), though there was no difference in specificity. There was no difference between imaging modalities in the evaluation of humeral bone loss (p = 1.000). Conclusions: In this multicenter study, MRA was the most commonly utilized preoperative advanced imaging study for patients with posterior shoulder instability. MRA had a higher sensitivity in detecting glenoid bone loss but lower sensitivity in detecting glenoid cartilage lesions compared to standard non-contrast MRI. There was no difference in diagnostic performance between MRA and MRI in the diagnosis of labral tears and humeral chondral and osseous lesions. MRA may provide an advantage over standard MRI in the evaluation of glenoid bone loss, which can influence the treatment plan for patients undergoing surgical management of posterior shoulder instability.

Poster 153: Decreased Coracoid Index in Patients with Recurrent Instability after an Arthroscopic Bankart Procedure: A Retrospective Analysis with a Mean Follow-Up of 12.9 Years

Objectives: Traumatic anterior shoulder instability is a common sports medicine pathology, disproportionally affecting competitive, contact athletic and military populations. Currently, arthroscopic Bankart repair is the gold standard for managing patients with anterior instability and associated labral injury with subcritical bone loss. However, recurrent instability remains common after the index operation, with rates between 5% and 20% reported in the literature. Multiple prognostic calculators and scoring indices have been developed in attempts to proactively determine which cohorts may benefit from a bony (Latarjet or free bone graft) or soft tissue (Remplissage) augmentation procedure to further stabilize the joint and decrease the risk of recurrence. Importantly, there has been a growing appreciation for the effects of coracoid process morphology on shoulder pathology, including subcoracoid impingement and subscapularis tears. However, there is a paucity of literature exploring the effect of coracoid morphology on anterior shoulder instability. Therefore, the purpose of this study was to compare known osseous risk factors for recurrent instability, as well as the coracoid index, between patients with and without recurrent instability after an arthroscopic Bankart repair, and to compare long-term outcomes between the 2 cohorts. Methods: Following institutional review board approval, a retrospective cohort comparison of patients with anterior glenohumeral instability treated at a single academic military medical facility was performed. After identifying the initial cohort, patients were invited to complete Western Ontario Shoulder Instability Index (WOSI) and Single Assessment Numeric Evaluation (SANE) surveys. Inclusion criteria included symptomatic anterior shoulder instability, surgical treatment with arthroscopic Bankart repair, and survey completion. Preoperative MRIs were obtained, and glenoid bone loss, Hill-Sachs interval, and coracoid index were quantified. Patients with recurrent instability at last follow up were age-matched in a 1:2 ratio for comparison with those without recurrent instability. Subsequently, unpaired two-tailed t tests were used to compare anatomic morphologies and patient-reported outcome measures (PROMs) between the 2 cohorts. Finally, linear regression was used to evaluate the relationship between the anatomic measurements and PROMs. Results: At a mean of 12.9 years follow-up, 12 patients were confirmed to have recurrent shoulder instability by survey and chart review and were age-matched to 24 patients without recurrent instability (n = 36; mean age 26.0 ± 5.2 years). Patients with recurrent instability after arthroscopic Bankart repair had lower coracoid indices (by 3.28 ± 1.55 mm; p = .0412), greater glenoid bone loss (by 6.67 ± 1.62%; p = .0002), and larger Hill-Sachs Intervals (by 5.88 ± 2.30 mm; p = .0153) on preoperative MRI. The cohort with recurrent instability had lower SANE scores (by 38.0 ± 9.1; p = .0002), and higher WOSI scores (by 692 ± 174; p = .0003) at final follow-up. Coracoid index, glenoid bone loss and Hill-Sachs interval were not correlated with PROMs at latest follow-up (p > 0.05). Conclusions: To our knowledge, this is the first study to assess coracoid morphology in a cohort of patients with symptomatic shoulder instability. The current study findings suggest that a more laterally-projecting coracoid may be protective against recurrent shoulder instability after an arthroscopic Bankart repair. In accordance with recent literature, the recurrent instability cohort had greater glenoid bone loss and larger Hill-Sachs lesions on their index pre-operative MRI and had worse subjective outcomes at latest follow-up. As the shoulder is a complex joint with static and dynamic stabilizers, it is important to understand the effects of anatomic variation on pathoanatomy, as well as patient symptomatology. These preliminary findings highlight the need for further large cohort studies investigating the role of coracoid morphology on shoulder stability. A clearer understanding of the anatomic risk factors for recurrent instability will improve surgical planning and decision making, as well as minimizing time missed from athletic activities or military service.

Single anterior shoulder dislocation patients demonstrate higher rates of posterior labral repair and biceps procedures than multiple dislocators at the time of arthroscopic stabilization surgery

IntroductionThe purpose of this study is to identify and compare demographic, clinical, historical, and intra-operative variables in patients who have received arthroscopic treatment for single versus multiple anterior shoulder dislocations. MethodsThis is a retrospective chart review of patients who underwent arthroscopic labral repair of the shoulder by six surgeons at a single institution between 2012-2020. Patients with a documented anterior shoulder dislocation were included. Patients with pain-only, subluxation-only, multi-directional or posterior instability, and prior shoulder surgeries of any kind were excluded. Studied variables included age, sex, laterality, body mass index, contact/collision sports, Charlson Comorbidity Index, tobacco use, number of dislocations (1, >1), labral tear size, time from first dislocation to surgery, anchor number, and concomitant procedures. Study groups were compared using student’s t-tests and Mann-Whitney U test for continuous variables and Chi-Square or Fisher’s Exact tests for discrete variables with a significance of 0.05. Results633 patients were identified and 351 [85 single dislocators (SD), 266 multiple dislocators (MD)] met inclusion criteria (mean age: 27 years; range: 14-71 years). There were no demographic differences between study groups. SD received surgery significantly sooner at 17 ± 44 months after injury, while MD received surgery 53 ± 74 months post-initial dislocation. SD (30/85, 35%) were significantly more likely than MD (56/266, 21%) to receive concomitant posterior labrum repair. MD (46/266, 17%) were significantly more likely than SD (5/85, 6%) to receive a Remplissage. SD (11/85, 13%) were significantly more likely than MD (11/266, 4%) to receive a concomitant biceps tenotomy/tenodesis. There were no other significant differences in injury or surgery characteristics. ConclusionMD will have more time between their initial dislocation and arthroscopic labral repair and were more likely to receive a Remplissage procedure, yet were less likely than SD to receive a concomitant posterior labral repair or biceps tenodesis/tenotomy despite no differences in age, sex, and activity level. Whether the greater extent of labrum injury in SD is due to a more severe initial injury versus earlier recognition and intervention requires further study.

Safety and efficacy of second-generation all-suture anchors in labral tear arthroscopic repairs: prospective, multicenter, 1-year follow-up study

BackgroundThis study’s primary aim was to assess the safety and performance of second-generation all-soft suture anchors following arthroscopic labral tear repair. MethodsThis prospective, multicenter study was conducted by 6 surgeons at 6 sites in Europe and the United States between November 2018 and August 2020. Patients who required shoulder arthroscopic repair, for a range of labral injuries, were treated with a second-generation all-soft suture anchor. The primary outcome was clinical success rate (percentage of patients without signs of failure and/or re-intervention) at 6 months. Secondary outcomes included clinical success rate at 12 months, intraoperative anchor deployment success rate, and patient-reported outcomes (PROs) at 6 and 12 months, including visual analog scale (VAS) pain assessment, VAS satisfaction assessment, EQ-5D-5L Index Score, EQ-5D-5L VAS Health Score, Rowe Shoulder Score for Instability, American Shoulder and Elbow Surgeons score, and Constant-Murley Shoulder (CMS) Score. Serious adverse events (SAE) and serious adverse device effects (SADE) were collected throughout the study. ResultsForty-one patients were enrolled (mean age, 28.2 years; 87.8% male, 12.2% female). Clinical success was achieved in 27/28 and 31/32 patients at 6 months and 12 months, respectively. Anchor deployment had a 100% success rate. Significant improvements over baseline were reported for all PROs except CMS (6 months) and VAS Satisfaction Score (12 months). One patient experienced 1 SAE and 1 patient experienced 1 SADE. ConclusionSecond-generation all-soft suture anchors used in this study demonstrated a high clinical success rate, a favorable safety profile, and patients exhibited significant improvement in PROs.

Three-Part Fracture Dislocation and Four-Part Fracture Dislocation of the Proximal Humerus: How Different are the Glenoid Labrum and Capsular Injuries Between Them?

Anterior fracture dislocation of the shoulder may have associated injury to the glenoid labrum and/or capsule. There is a need to look at the possible patterns of capsulo-labral injuries intra-operatively and correlate them with pre-operative radiographs and CT scans. It can enable surgeons to predict the patterns of soft-tissue injuries in a specific fracture type. Patients operated for ORIF of 3- and 4-part anterior fracture dislocation between January 2017 and December 2022 were included in the study. The following data were collected: demographic details, fracture morphology and classification on radiograph and CT scan, neurovascular injury, the subtype of anterior dislocation, and intra-operative identifiable injury to glenoid labrum and/or capsule. A total of 24 cases (mean age 40 ± 10years) of anterior fracture dislocation of the shoulder were included in the study and were grouped based on Neer's classification. 12 patients had 3-part anterior fracture dislocation (3-part Group) with a mean age of 34 ± 9years, while 12 patients had 4-part anterior fracture dislocation (4-part Group) with a mean age of 46 ± 7years (p = 0.001). 10 out of 12 patients in the 3-part Group had the subcoracoid position of the dislocated head, whereas the head was present in 9 out of 12 patients of the 4-part Group at the preglenoid position (p = 0.003). The head position was at a mean distance of 1.85cm from the anterior glenoid rim in the 4-part Group, whereas the head was engaged at the anterior rim of the glenoid in the 3-part Group. The medial metaphyseal beak was present in 11 out of 12 patients in the 3-part Group, whereas it was absent in all the cases of the 4-part Group (p = 0.001). 92% of the included patients in our study had capsulo-labral injury. 11 out of 12 patients in the 3-part Group had labral injury compared to 10 out of 12 patients in the 4-part Group with severe capsular stripping (p = 0.001). The 3-part fracture dislocation with radiological findings such as the long medial metaphyseal beak and subcoracoid position of the dislocated head had a strong association with a glenoid labral injury, whereas the 4-part fracture dislocation type had a widely displaced preglenoid position of the dislocated head with an absent metaphyseal beak and had a strong association with a capsular type of soft-tissue injury. III.

Pre-operative Assessment of Shoulder Pathologies on MRI by a Radiologist and an Orthopaedic Surgeon.

Pathologies of the shoulder, i.e. rotator cuff tears and labral injuries are very common. Most patients receive MRI examination prior to surgery. A correct assessment of pathologies is significant for a detailed patient education and planning of surgery. Sixty-nine patients were identified, who underwent both, a standardised shoulder MRI and following arthroscopic shoulder surgery in our hospital. For this retrospective comparative study, the MRIs were pseudonymised and evaluated separately by an orthopaedic surgeon and a radiologist. A third rater evaluated images and reports of shoulder surgery, which served as positive control. Results of all raters were then compared. The aim was an analysis of agreement rates of diagnostic accuracy of preoperative MRI by a radiologist and an orthopaedic surgeon. The overall agreement with positive control of detecting transmural cuff tears was high (84% and 89%) and lower for partial tears (70-80%). Subscapularis tears were assessed with moderate rates of agreement (60 - 70%) compared to intra-operative findings. Labral pathologies were detected mostly correctly. SLAP lesions and pulley lesions of the LHB were identified with only moderate agreement (66.4% and 57.2%) and had a high inter-rater disagreement. This study demonstrated that tears of the rotator cuff (supraspinatus, infraspinatus) and labral pathologies can be assessed in non-contrast pre-operative shoulder MRI images with a high accuracy. This allows a detailed planning of surgery and aftercare. Pathologies of the subscapularis tendon, SLAP lesions and biceps instabilities are more challenging to detect correctly. There were only small differences between a radiologic and orthopaedic interpretation of the images.

Acromioclavicular joint dislocation and concomitant labral lesions: a systematic review.

Acromioclavicular (AC) joint dislocations frequently co-occur with intra-articular glenohumeral pathologies. Few comprehensive studies have focused on labral tears specifically associated with AC joint trauma. This systematic review will address this gap. A comprehensive electronic search was conducted across PubMed, Cochrane Library, and Google Scholar (pages 1-20) spanning from 1976 to May 19, 2023. Seven studies met the inclusion criteria for this systematic review, consisting of three retrospective studies and four case series. These studies collectively involved 1,044 patients, of whom 282 had concomitant labral lesions. The pooled prevalence of intra-articular labral injuries associated with acute AC joint dislocation was 27%. The prevalence of these labral lesions varied significantly between studies, ranging from 13.9% to 84.0% of patients, depending on the study and the grade of AC joint dislocation. Various types of labral tears were reported, with superior labrum anterior to posterior (SLAP) lesions being the most common. The prevalence of SLAP lesions ranged from 7.2% to 77.4%, with higher grades of AC joint dislocations often associated with a higher prevalence of SLAP tears. Moreover, grade V dislocations exhibited a complete correlation with SLAP tears. The studies yielded contradictory findings regarding older age and higher grades of AC joint dislocation as risk factors for concurrent labral lesions. This review underscores the frequent association between labral lesions and AC joint dislocations, particularly in cases of lower-grade injuries. Notably, SLAP lesions emerged as the predominant type of labral tear.

髋臼盂唇损伤修复的研究进展

髋臼盂唇损伤修复的研究进展

Surgical treatment of patients with shoulder joint stiffness and injury to the glenoid labrum

Background. Most of our colleagues, upon discovering injuries to the glenoid labrum or other soft tissue structures of the shoulder joint in a patient, perform surgical interventions without paying attention to changes in its capsule. Objective: to compare the treatment outcomes of patients with shoulder contracture who underwent arthroscopic capsular release with re-fixation of the glenoid labrum versus those who underwent only re-fixation of the glenoid labrum.
 Materials and methods: The study included 98 patients with shoulder joint stiffness and glenoid labrum injury. The patients were divided into two groups: group 1 underwent re-fixation of the glenoid labrum and arthroscopic capsular release, while group 2 underwent re-fixation of the glenoid labrum without arthroscopic capsular release.
 Results: Three months after the operation, in group 2, the mean functional outcome according to the Constant Shoulder Score scale was slightly worse than in group 1 and ranged from 14.5 ± 6.2 points, while in group 1, the mean functional outcome was 8.5 ± 6 points (p = 0.031). Six months after the operation, in group 1, the mean functional outcome according to the Constant Shoulder Score scale was 5.1 ± 5.6 points, while in group 2, it was 10.1 ± 4.1 points (p = 0.024). Conclusion: The results of treating patients with secondary shoulder stiffness who underwent arthroscopic capsular release and fixation of the glenoid labrum were better according to the Constant Shoulder Score and the VAS scale at both 3 and 6 months after the operation than the results of treating patients who underwent only fixation of the glenoid labrum without arthroscopic capsular release.

Superior labrum anterior to posterior lesions: Part 2 - Classification with arthroscopic correlation.

The illustrated review functions as a crucial radiological guide for both radiologists and orthopaedic surgeons. The combination of illustrations, MR and correlative arthroscopic images enhances the comprehensive understanding of labral pathology. The value of the review lies in the presentation of imaging findings and classification, coupled with findings on arthroscopy. This understanding is vital in guiding orthopaedic management for patients, ensuring appropriate treatment strategies.

Superior labrum anterior to posterior lesions: Part 1 - Imaging and anatomy with arthroscopic classification.

The illustrated review functions as a crucial radiological guide for both radiologists and orthopaedic surgeons. The combination of illustrations, MR and correlative arthroscopic images enhances the comprehension of normal labral anatomy and its variants. The review underscores the significance of understanding anatomic variations that may be misinterpreted as pathology. This understanding is vital in guiding orthopaedic management for patients, ensuring appropriate treatment strategies.

Incidence ofShoulder Labral Pathology inUnited States Military Members.

Shoulder injuries account for approximately 8% to 24% of all musculoskeletal injuries in the military. Recently, a change was made to service-specific physical fitness tests. Knowledge of relative shoulder labral injury rates before and after this change would help guide future directions and preventive strategies. However, we found no previous literature evaluating the rates of labral injury among United States Military branch personnel by enlistment status (enlisted versus officer), gender, age, or race. In this retrospective epidemiological study, we queried the Defense Medical Epidemiology Database for International Classification of Disease, Tenth Revision (ICD-10) code S43.43 (superior glenoid labrum lesion) to determine the total number of patients with a shoulder labral injury from 2016 to 2019. Results were assessed for demographic associations of shoulder labral injury with branch, service occupation, rank, gender, race, and age. Queries were limited to first-time occurrences and ambulatory data only. Overall, our study found the incidence of shoulder labral injuries to be largely conserved each year from 2016 to 2019 (3.22-3.35/1000/year). Incidence of labral injury was highest in males, White service members, the junior enlisted, the Army service branch, ages 20 to 29, and enlisted non-combat personnel. With knowledge of injury patterns in specific military populations, initiatives may be taken to identify at-risk service members with the goal of informing future preventive strategies.